10187 - From Dusk Till Dawn

[funanue]

Can the StarAt time (train start time) be of type:
13:40
14:50
6:10
etc...
?????

or only:

13
14
6
...etc
????

[Jan]

2nd part is the correct one.

[crip121]

finally got it.

Code: Select all

aCED

[JohnTortugo]

Hello there!

I'm trying the following algorithm:

1. Create a directed graph, using city names as vertices and travel time as edges. I ignore all travels that satisfies this condition: (dep > 6 && dep < 18) OR (dep+tt > 30).
2. Do Dijkstra algoritm.

I'm using a stl map to lookup what's the city number and "dep-tt" as the weight of the edges.

This is a weighted graph oks? If yes, the edges weight can be (dep-tt)? and how i solve this using BFS (it isn't only for unweighted graphs?) ?

Thanks in advance!

PS: Sorry for my poor english.

[wh81]

Hi guys!

I am using Dijkstra algorithm and I get the right answers for all the test cases mentioned above. When I upload the code, I get RE. Does anyone have further test cases?

Thanks, wh81.

[marcelhp]

Hello
Anyone has some more test cases? My algorithm works well with all the ones posted here + the ones from the sample, but I still can't find out what's wrong =(

Anyway, here's my code, if you spot anything wrong let me know!

I did a BFS searching for the least time it takes to arrive to a certain city (where each day is counted as 12 hours - since I skipped the 6-18 period, being 18-24 the 0-6 and 0-6 the 6-12). So at the end I count the total time and the answer is (total-1)/12, since that's the amount of times it crossed the 12.00 boundary.

Code: Select all

import java.util.*;


public class Prob10187 {

	public class Node{
		public String cityTo;
		public int depart;
		public int travel;

		public Node(int d, int t, String to){
			depart = d;
			travel = t;
			cityTo = to;
		}
	}

	//convert from 24-hr to 12-hr (skipping 6-18)
	private static int convert(int time){
		if (time<=6){
			return time+6;
		}

		if (time==24){
			return 6;
		}

		return (time-18);
	}

	private static HashMap<String, Vector<Node>> map;

	private static int magia(String[] cities, String source, String dest){
		
		//hash used to map to the index
		HashMap<String, Integer> hash = new HashMap<String, Integer>();
		int time[] = new int[cities.length];
		for (int i=0; i<cities.length; i++){
			hash.put(cities[i], i);
		}

		//biiiig number
		Arrays.fill(time, 12000000);
		
		
		if (source.equals(dest)){
			return 0;
		}
		
		//if there's no way to get from or to, simply skip all
		if (!hash.containsKey(source) || !hash.containsKey(dest)){
			return 12000000;
		}
		
		int indexSource = hash.get(source);
		time[indexSource] = 0;

		//to do BFS
		Queue<Integer> q = new LinkedList<Integer>();
		q.add(indexSource);

		while(!q.isEmpty()){
			int n = q.poll();
			Vector<Node> v = map.get(cities[n]);
			if (v==null){
				continue;
			}
			
			int size = v.size();
			for (int i=0; i<size; i++){
				//get time to get to the city
				int index = hash.get(v.get(i).cityTo);
				int newTime = newTime(v.get(i), time[n]);
				if(newTime<time[index]){
					//if it's better, save it and add the node to the queue
					time[index] = newTime;
					q.add(index);
				}
			}
		}

		int indexDest = hash.get(dest);
		return (time[indexDest]-1)/12;
	}

	private static int newTime(Node node, int best){
		if (node.depart>=(best%12)){
			return (best/12)*12+node.depart+node.travel;
		}

		//stay one day at the station and depart the next one
		return (best/12)*12+node.depart+node.travel+12;
	}

	public static void main(String args[]){
		Scanner input = new Scanner(System.in);
		int cant = input.nextInt();

		Prob10187 x = new Prob10187();

		for (int z=0; z<cant; z++){
			int conn = input.nextInt();
			
			map = new HashMap<String, Vector<Node>>();
			HashSet<String> h = new HashSet<String>();

			for (int i=0; i<conn; i++){
				String from = input.next();
				String to = input.next();

				int dep = input.nextInt();
				int travel = input.nextInt();
				
				//skip if it's not a valid entry
				if ((dep>=6&&dep<18)||(travel+dep>6&&dep<=6)||(travel+dep>30)){
					continue;
				}
				
				//check if cities exist
				if (!h.contains(from)){
					h.add(from);
				}
				if (!h.contains(to)){
					h.add(to);
				}
				
				dep = convert(dep);
				
				Node n = x.new Node(dep, travel, to);

				if (!map.containsKey(from)){
					Vector<Node> v = new Vector<Node>(5);
					map.put(from, v);
				}
				map.get(from).add(n);
			}
			
			int size = h.size();
			String[] cities = new String[size];
			Object[] o = h.toArray();
			for (int i=0; i<size; i++){
				cities[i] = (String)o[i];
			}
			
			String from = input.next();
			String to = input.next();
			
			int ans = magia(cities,from, to);
			System.out.println("Test Case "+(z+1)+".");
			if (ans > 10000000){
				System.out.println("There is no route Vladimir can take.");
			}else{
				System.out.println("Vladimir needs " + ans + " litre(s) of blood.");
			}
		}
	}
}

Thanks! =)

[Angeh]

Hi , experts ...
I need some help , how to constrcut the Graph ????
how to manage the 2-D states ...
thanks in advance ....

[Angeh]

I cant understand whats wrong with this code ...
could some one give some test case to break my algorithm ....

Code: Select all

/*
11.50
*/
#include<iostream>
#include<string>
#include<map>
#include<vector>
#include<queue>
using namespace std;
#define FOR(i,n) for(int i=0;i<n;++i)
typedef pair<int ,int > Pii;
vector< Pii > Graph[110][15];
int mark[110][15];
vector<int> Graph1[110];
int level[110];
int mark1[110];
int CA=0;
int mapTime(int t){
	t%=24;
	if(t>=18) return t-18;
	if(t<=6) return t+6;
}
void BFS(int start){
	CA++;
	queue< Pii > Q;
	Q.push(Pii(start,0) );
	mark[start][0]=CA;
	while(!Q.empty()){
		Pii u = Q.front();Q.pop();
		if(u.second==12 ){ Graph1[start].push_back(u.first);continue;}
		FOR(i,Graph[u.first][u.second].size() ){
			Pii v= Graph[u.first][u.second][i];
			if(mark[v.first][v.second]==CA)continue;
			mark[v.first][v.second]=CA;
			Q.push(v);
		}
	}
}
int BFS1(int start,int des ){
	CA++;
	queue<int> Q;
	Q.push(start);
	mark1[start]=CA;
	level[start]=0;
	while(!Q.empty() ){
		int u =Q.front();Q.pop();
		FOR(i,Graph1[u].size()){
			int v= Graph1[u][i];
			if(mark1[v]==CA)continue;
			mark1[v]=CA;
			level[v]=level[u]+1;
			if(v==des)return level[des];
			Q.push(v);
		}
	}
	return -1;
}
int main(){
	int cas,n;
	//freopen("in.txt","r",stdin);
	//freopen("out.txt","w",stdout);
	scanf("%d",&cas);
	for(int ca=0;ca<cas;++ca){
		map<string,int> m;
		scanf("%d",&n);
		char s1[100],s2[100];
		int C=0,start,duration;
		FOR(i,n){
			scanf("%s%s%d%d",s1,s2,&start,&duration);
			if( (start<18 && start>=6) || duration>12 )	{/*printf("ignored %s %s %d %d\n",s1,s2,start,duration);*/ continue;}
			if( ( (start+duration)%24<18 && (start+duration)%24 >6) ){/*printf("ignored %s %s %d %d\n",s1,s2,start,duration);*/ continue;}
			//cout << s1<<" "<<s2<<" "<<start <<" "<<duration <<endl;
			int src = m.find(s1)!=m.end() ?m[s1]:m[s1]=C++;	
			int des = m.find(s2)!=m.end() ?m[s2]:m[s2]=C++;	
			Graph[src][ mapTime(start) ].push_back( Pii(des,mapTime(start+duration)) );
		}
		FOR(c,C) FOR(t,12) Graph[c][t].push_back(Pii(c,t+1) );
		/*FOR(c,C){ FOR(t,12){
				FOR(i,Graph[c][t].size() ){
					printf(" %d/%d ",Graph[c][t][i].first,Graph[c][t][i].second);
				}
				putchar('|');
			}
			putchar('\n');
		}*/
		FOR(c,C) BFS(c);
	/*	FOR(c,C){
			printf("%d->",c);
			FOR(i,Graph1[c].size() ){
				printf(" %d",Graph1[c][i] );
			}
			putchar('\n');
		}
*/
		scanf("%s%s",s1,s2);
		int src = m.find(s1)!=m.end() ?m[s1]:m[s1]=C++;	
		int des = m.find(s2)!=m.end() ?m[s2]:m[s2]=C++;	
		int blood = BFS1(src,des);
		printf("Test Case %d.\n",ca+1);
		if(blood>=0)printf("Vladimir needs %d litre(s) of blood.\n",blood-1);
		else puts("There is no route Vladimir can take.");
		FOR(i,110)Graph1[i].clear(); 
		FOR(i,110)FOR(j,14)Graph[i][j].clear();
	}
	return 0;
}

[jenovano2sko]

Hi all, can anyone please post some more test cases that might break programs? I can't seem to break my algorithm, but it gets W.A. I have used every test case on the forum so far, as well as test cases I've written on my own, and all the samples.

If you're interested in my code, specifically:

Code: Select all

#include <map>
#include <string> 
#include <iostream> 
#include <climits> 
#include <queue> 
using namespace std; 

bool isValid(int testDepartureTime, int testTravelTime);



//contains train data from city to city 
//edges of the graph. 
class trainRide {
public: 
    trainRide(){}
    trainRide(int newDepartureTime, int newTravelTime) : departureTime(newDepartureTime), arrivalTime(newDepartureTime + newTravelTime) {}

    int departureTime, // the time the train departs
        arrivalTime; // the time the train arrives in the next city
};


//contains a table of train data.
//nodes of the graph
class cityNode{
public: 
    //data:
    trainRide **outEdges[101];
    int outEdgeIndeces[101]; 
    int arrivalTime; //the time the best train arrives
    int weightToArrivalTime; //the weight to the arrival time
    bool visited; //whether this has been visited by Dijkstra

    //functions: 
    void initialClear() {
        visited = false; 
        for(int i = 0; i < 101; i++) //for each node
        {
            outEdges[i] = 0; 
            outEdgeIndeces[i] = 0;
        }
        arrivalTime = weightToArrivalTime = LONG_MAX; 
    } //void initialClear


    void clear() {
        visited = false;
        for(int i = 0; i < 101; i++)
        {
            if(outEdgeIndeces[i] != 0)
            {
                for(int j = 0; j < outEdgeIndeces[i]; j++)
                    delete outEdges[i][j]; 

                outEdgeIndeces[i] = 0; 
            }//if there is a route from this city to that city at all 

            if(outEdges[i] != 0)
            {
                delete outEdges[i]; 
                outEdges[i] = 0;
            }
        }//for each possible other node

        arrivalTime = weightToArrivalTime = LONG_MAX; 
    }//void clear



    void addEdge(int destCityNum, int departTime, int travelTime)
    {
        if(!outEdges[destCityNum])
        {
            outEdges[destCityNum] = new trainRide*[1001]; 
            for(int j = 0; j < 1001; j++)
               outEdges[destCityNum][j] = 0; 
        }

        outEdges[destCityNum][(outEdgeIndeces[destCityNum])++] = new trainRide(departTime, travelTime); 
    }//void addEdge



    bool isBetter(trainRide *testEdge, int weightToTestEdge) {
        if(weightToTestEdge < weightToArrivalTime)
            return true; 
        else if(weightToTestEdge == weightToArrivalTime && testEdge->arrivalTime < arrivalTime)
            return true; 
        else
            return false; 
    }//bool isBetter



    trainRide *bestEdgeOverall(int destCity) {
        trainRide *currentBest = outEdges[destCity][0];

        int i = 1; 
        while(outEdges[destCity][i] != 0)
        {
            if(outEdges[destCity][i]->arrivalTime < currentBest->arrivalTime)
                currentBest = outEdges[destCity][i]; 

            i++; 
        }
        return currentBest; 
    }//bestEdgeOverall



    trainRide *bestEdgeAfterArrivalTime(int destCity) {
        trainRide *currentBest = 0; 
        int i = 0; 

        //see if you can get any edge at all
        while(outEdges[destCity][i] != 0)
        {
            if(outEdges[destCity][i]->departureTime >= arrivalTime)
            {
                currentBest = outEdges[destCity][i]; 
                break;
            }
            i++; 
        }

        while(outEdges[destCity][i] != 0)
        {
            if( outEdges[destCity][i]->arrivalTime < currentBest->arrivalTime
               && outEdges[destCity][i]->departureTime >= arrivalTime)
                currentBest = outEdges[destCity][i]; 
            i++; 
        }

        return currentBest; 
    }//bestEdgeAfterArrivalTime

    void update(trainRide *newInEdge, int newWeight) {
        arrivalTime = newInEdge->arrivalTime; 
        weightToArrivalTime = newWeight; 
    }
};


int dijkstra(cityNode *cities, int numCities, int sourceCity, int destCity);

int main(void) {
    
    map<string, int> cityMap;
    string city1, city2; 
    int numCases, numEntries, numCity1, numCity2, currentCityIndex = 0;
    int departTime, travelTime, travelCost;
    cityNode cities[101]; 

    for(int i = 0; i < 101; i++)
        cities[i].initialClear(); 

    cin >> numCases; 

    for(int cases = 1; cases <= numCases; cases++)
    {
        cin >> numEntries;

        //construct the graph
        for(int i = 0; i < numEntries; i++)
        {
            cin >> city1 >> city2 >> departTime >> travelTime; 
            
            departTime = departTime % 24; 
            if(cityMap.find(city1) == cityMap.end())
                cityMap[city1] = currentCityIndex++; 
            if(cityMap.find(city2) == cityMap.end())
                cityMap[city2] = currentCityIndex++; 

            numCity1 = cityMap[city1]; 
            numCity2 = cityMap[city2]; 

            if(departTime < 18)   //recall that to arrive somewhere at 5:00 AM is worse than arriving at 10:00 P.M.
                departTime += 24;  //this normalization accounts for that. 

            if(isValid(departTime, travelTime))
                cities[numCity1].addEdge(numCity2, departTime, travelTime); 
        }//for each itinerary in this test case 

        //retrieve the source and destination nodes 
        cin >> city1 >> city2; 

        cout << "Test Case " << cases << ".\n"; 
        if(numEntries == 0)
        {
            cout << "Vladimir needs 0 litre(s) of blood.\n";
            continue; 
        }
        //run the modified version of Dijkstra's algorithm
        travelCost = dijkstra(cities, currentCityIndex, cityMap[city1], cityMap[city2]);

        //case 1: the destination is unreachable 
        if(travelCost == LONG_MAX)
            cout << "There is no route Vladimir can take.\n";
        else
            cout << "Vladimir needs " << travelCost << " litre(s) of blood.\n"; 
        //clear the graph and map
        for(int i = 0; i < 101; i++)
            cities[i].clear(); 
        cityMap.clear(); 
        currentCityIndex = 0; 

    }//for each test case 


    return(0); 
}





bool isValid(int testDepartureTime, int testTravelTime)
{
    if(testDepartureTime > 29)
        return false;
    
    if(testDepartureTime + testTravelTime > 30)
        return false; 

    return true; 
}


//nifty little things required by Dijkstra's algorithm
class dummyNode {
public: 
    dummyNode(int sourceCityNum, const cityNode &sourceCity)
    {
        correspondingCity = sourceCityNum;
        arrivalTime = sourceCity.arrivalTime; 
        weightToArrivalTime = sourceCity.weightToArrivalTime; 
    }

    int correspondingCity; //the city to which this node corresponds 
    int arrivalTime;       //the arrival time in that city
    int weightToArrivalTime; //the weight used to get to that arrival time
};




bool operator < (const dummyNode &lhs, const dummyNode &rhs) {
    if(rhs.weightToArrivalTime < lhs.weightToArrivalTime)
        return(true);
    else if(    rhs.weightToArrivalTime == lhs.weightToArrivalTime
             && rhs.arrivalTime < lhs.arrivalTime)
        return(true); 
    else
        return(false); 
}




int dijkstra(cityNode *cities, int numCities, int sourceCity, int destCity)
{
    cities[sourceCity].arrivalTime = 18; 
    cities[sourceCity].weightToArrivalTime = 0; 
    cityNode *currentCity; 
    trainRide *bestAfterArrival, *bestOverall;
    int updateWeight; 
    bool improved; 

    priority_queue<dummyNode> heap;

    heap.push(dummyNode(sourceCity, cities[sourceCity])); 

    //Dijkstra's algorithm begins here: 
    while(heap.empty() == false)
    {
        //we grab the city that we're currently concerned with
        currentCity = &cities[ (heap.top()).correspondingCity ];
        
        //if the city has been visited, continue. (bad heap workaround)
        if(currentCity->visited == true)
        {
            heap.pop(); 
            continue; 
        }
        currentCity->visited = true; 

        //for each possible city we are connected to
        for(int i = 0; i < numCities; i++)
        {
            improved = false; //assume you did not improve upon this city
            //if there is at least one edge to this city
            if(currentCity->outEdgeIndeces[i] == 0)
                continue; 
            if(cities[i].visited == true)
                continue; 

            updateWeight = currentCity->weightToArrivalTime; 

            //get the best arrival time to this city leaving after our departure time
            bestAfterArrival = currentCity->bestEdgeAfterArrivalTime(i); 
            //if such a departure time exists, use it, because there is no way you can improve by waiting one day
            if(bestAfterArrival != 0)
            {
                if(cities[i].isBetter(bestAfterArrival, updateWeight))
                    cities[i].update(bestAfterArrival, updateWeight); 

                improved = true; //you improved upon the city
            }
            else //you must wait a day, so grab the best time you can get to the next city on the next day 
            {
                updateWeight += 1; 
                bestOverall = currentCity->bestEdgeOverall(i); 
                
                if(cities[i].isBetter(bestOverall, updateWeight))
                    cities[i].update(bestOverall, updateWeight); 

                improved = true; //you improved upon the city 
            }
            
            //also, if we can improve upon it, push a new dummy of it into the heap
            if(improved == true && i != destCity)
            heap.push(dummyNode(i, cities[i])); 
        }
        //pop from the heap 
        heap.pop(); 
    }

    return cities[destCity].weightToArrivalTime; 
}

The code is long, so if you feel like paging through it, you'll find everything you need in the function 'int dijkstra()' at the bottom ;-P

[DD]

I got many W.As due to priority_queue in C++. After I used my hand-made heap, I got A.C. Still don't understand why this happen...

[chylek]

can anyone help?
my code works fine for every input I found and I created, but still WA

Code: Select all

AC

[brianfry713]

Edit: removed incorrect I/O.

[chylek]

first of all - it 's incorrect input but if this is AC output there is no option this input could be in tests, because UVa's anwser is:

Code: Select all

Test Case 1.
Vladimir needs 0 litre(s) of blood.
Test Case 2.
Vladimir needs 0 litre(s) of blood.
Test Case 3.
Vladimir needs 0 litre(s) of blood.
Test Case 4.
Vladimir needs 0 litre(s) of blood.
Test Case 5.
Vladimir needs 0 litre(s) of blood.
Test Case 6.
Vladimir needs 0 litre(s) of blood.
Test Case 7.
Vladimir needs 0 litre(s) of blood.
Test Case 8.
Vladimir needs 0 litre(s) of blood.
Test Case 9.
Vladimir needs 0 litre(s) of blood.
Test Case 10.
Vladimir needs 0 litre(s) of blood.
Test Case 11.
Vladimir needs 0 litre(s) of blood.
Test Case 12.
Vladimir needs 0 litre(s) of blood.
Test Case 13.
Vladimir needs 0 litre(s) of blood.
Test Case 14.
Vladimir needs 0 litre(s) of blood.
Test Case 15.
Vladimir needs 0 litre(s) of blood.
Test Case 16.
Vladimir needs 0 litre(s) of blood.
Test Case 17.
Vladimir needs 0 litre(s) of blood.
Test Case 18.
Vladimir needs 0 litre(s) of blood.
Test Case 19.
Vladimir needs 0 litre(s) of blood.
Test Case 20.
Vladimir needs 0 litre(s) of blood.
Test Case 21.
Vladimir needs 0 litre(s) of blood.
Test Case 22.
Vladimir needs 0 litre(s) of blood.
Test Case 23.
Vladimir needs 0 litre(s) of blood.
Test Case 24.
Vladimir needs 0 litre(s) of blood.
Test Case 25.
Vladimir needs 0 litre(s) of blood.
Test Case 26.
Vladimir needs 0 litre(s) of blood.
Test Case 27.
Vladimir needs 0 litre(s) of blood.
Test Case 28.
Vladimir needs 0 litre(s) of blood.
Test Case 29.
Vladimir needs 0 litre(s) of blood.
Test Case 30.
Vladimir needs 0 litre(s) of blood.
Test Case 31.
Vladimir needs 0 litre(s) of blood.
Test Case 32.
Vladimir needs 0 litre(s) of blood.
Test Case 33.
Vladimir needs 0 litre(s) of blood.
Test Case 34.
Vladimir needs 0 litre(s) of blood.
Test Case 35.
Vladimir needs 0 litre(s) of blood.
Test Case 36.
Vladimir needs 0 litre(s) of blood.
Test Case 37.
Vladimir needs 0 litre(s) of blood.
Test Case 38.
Vladimir needs 0 litre(s) of blood.
Test Case 39.
Vladimir needs 0 litre(s) of blood.
Test Case 40.
Vladimir needs 0 litre(s) of blood.
Test Case 41.
Vladimir needs 0 litre(s) of blood.
Test Case 42.
Vladimir needs 0 litre(s) of blood.
Test Case 43.
Vladimir needs 0 litre(s) of blood.
Test Case 44.
Vladimir needs 0 litre(s) of blood.
Test Case 45.
Vladimir needs 0 litre(s) of blood.
Test Case 46.
Vladimir needs 0 litre(s) of blood.
Test Case 47.
Vladimir needs 0 litre(s) of blood.
Test Case 48.
Vladimir needs 0 litre(s) of blood.
Test Case 49.
Vladimir needs 0 litre(s) of blood.
Test Case 50.
Vladimir needs 0 litre(s) of blood.
Test Case 51.
Vladimir needs 0 litre(s) of blood.
Test Case 52.
Vladimir needs 0 litre(s) of blood.
Test Case 53.
Vladimir needs 0 litre(s) of blood.
Test Case 54.
Vladimir needs 0 litre(s) of blood.
Test Case 55.
Vladimir needs 0 litre(s) of blood.
Test Case 56.
Vladimir needs 0 litre(s) of blood.
Test Case 57.
Vladimir needs 0 litre(s) of blood.
Test Case 58.
Vladimir needs 0 litre(s) of blood.
Test Case 59.
Vladimir needs 0 litre(s) of blood.
Test Case 60.
Vladimir needs 0 litre(s) of blood.
Test Case 61.
Vladimir needs 0 litre(s) of blood.
Test Case 62.
Vladimir needs 0 litre(s) of blood.
Test Case 63.
Vladimir needs 0 litre(s) of blood.
Test Case 64.
Vladimir needs 0 litre(s) of blood.
Test Case 65.
Vladimir needs 0 litre(s) of blood.
Test Case 66.
Vladimir needs 0 litre(s) of blood.
Test Case 67.
Vladimir needs 0 litre(s) of blood.
Test Case 68.
Vladimir needs 0 litre(s) of blood.
Test Case 69.
Vladimir needs 0 litre(s) of blood.
Test Case 70.
Vladimir needs 0 litre(s) of blood.
Test Case 71.
Vladimir needs 0 litre(s) of blood.
Test Case 72.
Vladimir needs 0 litre(s) of blood.
Test Case 73.
Vladimir needs 0 litre(s) of blood.
Test Case 74.
Vladimir needs 0 litre(s) of blood.
Test Case 75.
Vladimir needs 0 litre(s) of blood.
Test Case 76.
Vladimir needs 0 litre(s) of blood.
Test Case 77.
Vladimir needs 0 litre(s) of blood.
Test Case 78.
Vladimir needs 0 litre(s) of blood.
Test Case 79.
Vladimir needs 0 litre(s) of blood.
Test Case 80.
Vladimir needs 0 litre(s) of blood.
Test Case 81.
Vladimir needs 0 litre(s) of blood.
Test Case 82.
Vladimir needs 0 litre(s) of blood.
Test Case 83.
Vladimir needs 0 litre(s) of blood.
Test Case 84.
Vladimir needs 0 litre(s) of blood.
Test Case 85.
Vladimir needs 0 litre(s) of blood.
Test Case 86.
Vladimir needs 0 litre(s) of blood.
Test Case 87.
Vladimir needs 0 litre(s) of blood.
Test Case 88.
Vladimir needs 0 litre(s) of blood.
Test Case 89.
Vladimir needs 0 litre(s) of blood.
Test Case 90.
Vladimir needs 0 litre(s) of blood.
Test Case 91.
Vladimir needs 0 litre(s) of blood.
Test Case 92.
Vladimir needs 0 litre(s) of blood.
Test Case 93.
Vladimir needs 0 litre(s) of blood.
Test Case 94.
Vladimir needs 0 litre(s) of blood.
Test Case 95.
Vladimir needs 0 litre(s) of blood.
Test Case 96.
Vladimir needs 0 litre(s) of blood.
Test Case 97.
Vladimir needs 0 litre(s) of blood.
Test Case 98.
Vladimir needs 0 litre(s) of blood.
Test Case 99.
Vladimir needs 0 litre(s) of blood.
Test Case 100.
Vladimir needs 0 litre(s) of blood.

and this is what my program says
what's more there is no numbers of trains in each test case so this is correct input in my opinion:

Code: Select all

99
1
znpqwmoh r 16 2
ehxlt caduuvtadxezwvp
9
oprppbdrgs hjeznttneonex 19 12
oprppbdrgs vll 2 5
o ogtdbchrojc 22 11
bfveomuzpri xkrqtczrqxcd 16 5
hladn vll 17 11
hjeznttneonex otyjt 2 1
evilqozfiawbicmh o 7 9
ynvdicjajtgdonbmnx lxi 4 1
evilqozfiawbicmh oprppbdrgs 9 3
ibutzaqozffzmqwyf z
18
qtxcge wor 2 1
ehsmnqhxz ftyvbardzengt 11 2
ssexrkmzdqp tuh 15 1
yrdnpzzt owtkdjgyoqicw 16 10
xkihnoh ftyvbardzengt 22 8
ssexrkmzdqp xkihnoh 24 4
ftyvbardzengt qmifxskhcibtbt 23 1
ftyvbardzengt n 19 5
ibejulhizbmwisxg qmifxskhcibtbt 22 1
wor owtkdjgyoqicw 19 8
qmifxskhcibtbt ssexrkmzdqp 15 1
tuh ehsmnqhxz 14 7
n xkihnoh 15 11
n xkihnoh 21 7
ehsmnqhxz vllsexheaxtxqp 9 7
aekuufvnjidijysprq o 17 4
qmifxskhcibtbt vllsexheaxtxqp 9 2
yrdnpzzt ssexrkmzdqp 24 7
owtkdjgyoqicw ehsmnqhxz
5
hoo xtyaszaeqmbmmnzjw 20 9
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xtyaszaeqmbmmnzjw lagzxmry 23 10
lagzxmry xtyaszaeqmbmmnzjw 1 4
porhavtoiszgjvffse uzwvwipwiwlzrkspm 11 11
xtyaszaeqmbmmnzjw lagzxmry
12
fbvfvjtjdmr nj 23 3
x ckcuxulgb 13 9
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lfru x 11 4
mjb fbvfvjtjdmr 8 3
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nj wmvpjffoicvd 19 6
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khci grncwkzvu
10
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vfwqbsf rl
4
kyi gdtdrxhfr 14 12
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5
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6
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6
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yes glcceafhymyn
29
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27
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a eaezmjasbibgogyna 23 5
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7
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sv itoercalhjlhuxqyqqjg
0
rezgichvvfpfr mamsnarcqpnepe
0
oqwhdcdilmfhepkcxv mvehpnngskozzxbctv
6
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psrc hkl
27
rlhvpvggxm vgyrzrpbkualmpxze 9 9
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rlhvpvggxm smvanobedcpzccl 21 6
znayg rlhvpvggxm 5 2
rlhvpvggxm smvanobedcpzccl 21 5
rlhvpvggxm smvanobedcpzccl 8 6
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znayg vgyrzrpbkualmpxze 1 4
znayg rlhvpvggxm 9 1
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znayg rlhvpvggxm 22 9
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smvanobedcpzccl rlhvpvggxm
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zccf r
7
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aibotb txgr
21
sshapeuzy ergncfoxjurxkle 16 12
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tviu sshapeuzy 7 2
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sshapeuzy ergncfoxjurxkle 23 9
tviu sshapeuzy 16 9
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tviu ergncfoxjurxkle 15 11
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ergncfoxjurxkle gzvbpp 2 3
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tviu sshapeuzy 15 10
gzvbpp sshapeuzy 11 8
gzvbpp ergncfoxjurxkle 2 6
gzvbpp tviu 6 5
tviu sshapeuzy
0
o vyidnynpoajbn
23
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k fprwtr 14 10
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fip ngtsyfztuy 2 11
k ngtsyfztuy 8 3
fip xnyoeyyhougxrpk 18 2
ngtsyfztuy fprwtr 1 4
k xnyoeyyhougxrpk 5 11
k fip 24 10
ngtsyfztuy k 23 1
fprwtr k 5 7
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z xnyoeyyhougxrpk 14 6
ngtsyfztuy z 6 4
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fip k 1 6
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xnyoeyyhougxrpk k 13 6
fip z
15
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sh kbrefhjlfuovcrnesvli
16
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nxislka mdvrnznsmh 18 10
mdvrnznsmh c 16 7
mdvrnznsmh oin 18 7
mdvrnznsmh c 24 10
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oin nxislka 4 2
c nxislka 8 7
mdvrnznsmh nxislka 21 5
mdvrnznsmh nxislka
25
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29
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2
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21
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zpkuonqxirpxydrfot ael
2
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epz xm
8
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btqyjebnt cwnozafpplhtmmnptwx 1 10
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qvzxmbmpqnfqczes ixrskddk 18 4
fi qvzxmbmpqnfqczes
16
jduq eqzmeg 11 9
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jduq a 22 2
a ntdfirraowoyhywntl 22 5
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uvlcvlvltvpsqc eqzmeg 2 8
jduq kveszemnmemjmtda 9 10
lfhkespqqhwrbht uvlcvlvltvpsqc 14 5
ijhvgvpbmjtoqfumvkm eqzmeg 4 3
ijhvgvpbmjtoqfumvkm axtqgxdzv 23 1
a uvlcvlvltvpsqc 17 7
zjmizkkngyhbcvikox ffsoixjrh 3 4
ntdfirraowoyhywntl wyagcuwtkfre 4 12
wyagcuwtkfre ohenqvinwnwllt
17
mpzkrcpzufuqi xabdgsqvwaqp 14 10
t kvs 12 9
myfshewkbevz g 12 5
m bmlecgjxcbvhkxmpo 19 5
t xabdgsqvwaqp 9 5
m u 3 7
h sopwlby 20 2
u t 4 6
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u xabdgsqvwaqp 7 9
eobemex h 14 10
kvs xabdgsqvwaqp 1 3
buzxsvghlwg xabdgsqvwaqp
9
acw qmpspzngveaemcqac 20 10
cimvlgucpdepwtwgggv hkprnzr 18 3
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acw jfmumgzdlfsjypqexnez 23 3
hkprnzr acw 5 9
qmpspzngveaemcqac cwamluzmloxtcthisk 12 9
aefyvxftkjue acw
18
thv luoyakeorcxzjyravpu 19 3
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thv luoyakeorcxzjyravpu 9 11
k thv 19 4
zvnymneuglgvhghyspx ltomqvimxvjmtlwxzp 9 12
luoyakeorcxzjyravpu thv 15 10
ltomqvimxvjmtlwxzp k 18 5
thv ltomqvimxvjmtlwxzp 16 6
fgazxfvw ltomqvimxvjmtlwxzp 22 10
ltomqvimxvjmtlwxzp k 14 4
thv zvnymneuglgvhghyspx 9 8
k thv 17 6
luoyakeorcxzjyravpu fgazxfvw 5 4
ltomqvimxvjmtlwxzp fgazxfvw 14 7
zvnymneuglgvhghyspx k 20 9
fgazxfvw thv 13 9
zvnymneuglgvhghyspx fgazxfvw 12 6
ltomqvimxvjmtlwxzp fgazxfvw 5 8
zvnymneuglgvhghyspx fgazxfvw
13
oawberprmi brqbpxwt 11 10
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fjvvk brqbpxwt 9 6
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fjvvk klynjczncsnktrn 12 5
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vkevpgizbdgwiyhzobs ypruudzfxzvvjbqbky 11 8
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17
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hwrrpndcby nwelwlk 22 12
nwelwlk bedvxrhhiuhswknm 4 5
hwrrpndcby ikwsxaezhyqpuqqatnam 23 7
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ikwsxaezhyqpuqqatnam nwelwlk 5 1
hwrrpndcby nwelwlk 10 9
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bedvxrhhiuhswknm nwelwlk 20 10
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nwelwlk oddqzeevgfurokkom 1 9
ikwsxaezhyqpuqqatnam jcuf 19 11
nwelwlk ikwsxaezhyqpuqqatnam 3 2
w hwrrpndcby 16 11
w kfnzf 14 2
hwrrpndcby oddqzeevgfurokkom
19
kcbs zuwhfjwwvlstuaoes 2 12
kcbs evlmeenporsjtudqbk 19 4
evlmeenporsjtudqbk kcbs 8 8
evlmeenporsjtudqbk puxdaiiqa 24 1
zuwhfjwwvlstuaoes kcbs 24 3
puxdaiiqa zuwhfjwwvlstuaoes 17 5
puxdaiiqa evlmeenporsjtudqbk 6 7
kcbs zuwhfjwwvlstuaoes 21 8
evlmeenporsjtudqbk kcbs 16 8
evlmeenporsjtudqbk zuwhfjwwvlstuaoes 3 5
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zuwhfjwwvlstuaoes kcbs 9 8
puxdaiiqa evlmeenporsjtudqbk 13 12
evlmeenporsjtudqbk kcbs 9 6
evlmeenporsjtudqbk zuwhfjwwvlstuaoes 7 3
evlmeenporsjtudqbk kcbs 23 2
evlmeenporsjtudqbk zuwhfjwwvlstuaoes 18 5
kcbs zuwhfjwwvlstuaoes 9 12
evlmeenporsjtudqbk zuwhfjwwvlstuaoes 24 5
zuwhfjwwvlstuaoes evlmeenporsjtudqbk
13
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rr kvncexdwphbvx 15 7
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coldjkjakn zuztxykdtbdgz 5 7
lsm dgqaht 19 12
nuczbpvhgvozxlbvz kvncexdwphbvx 5 1
hcp qsnhbrcaxjszrhasta
8
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dilpk cbvwvdgr 19 2
cbvwvdgr zwvbioaqupuhfrfob 18 8
jkxzjswwcgyrrv yb 14 6
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tlpmmnnztxmk vpnxfms 18 3
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tlpmmnnztxmk yb 15 4
jkxzjswwcgyrrv zwvbioaqupuhfrfob
1
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6
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rl zpwfyvg 8 8
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24
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jm bvzypjvbkfebrmtkl 20 7
vqrjjbuklveriaov pl 12 2
ysvodsrn xrhsofmk 17 4
xrhsofmk kiqtxhxqrwkcpyfmha 5 12
harvknmmcqqmojgugvl pcneckwtufwo 17 1
vqrjjbuklveriaov aw 12 12
bvzypjvbkfebrmtkl tlemcqanxut 24 7
pcneckwtufwo tlemcqanxut 13 1
kiqtxhxqrwkcpyfmha hbsgnwvlbjubt 16 1
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pcneckwtufwo tlemcqanxut 5 8
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wmbia aw 6 10
qu ysvodsrn 19 9
tlemcqanxut aw 13 2
tlemcqanxut ysvodsrn 22 9
hbsgnwvlbjubt kiqtxhxqrwkcpyfmha 9 1
hbsgnwvlbjubt jm 5 3
jjsfikzlalxjlpfx pl 5 9
harvknmmcqqmojgugvl bvzypjvbkfebrmtkl 17 7
pl harvknmmcqqmojgugvl 14 2
jm pcneckwtufwo 20 8
jm kiqtxhxqrwkcpyfmha
7
dmsiqwjwndarees bbczoixadfa 12 6
orurwwqauxiknzp gpvxmovievedfpreekq 14 3
mhzcflyvoaov orurwwqauxiknzp 17 9
gpvxmovievedfpreekq vvtgerhjopvodedzdru 24 2
pwzmtykhyvngyksi mhzcflyvoaov 3 9
o orurwwqauxiknzp 15 9
cvhgoop dmsiqwjwndarees 11 2
o pwzmtykhyvngyksi
15
qdjgwajtnhtydz rii 2 4
oclhhwngwyzlitklsje gzb 7 6
flxujebmsx qdjgwajtnhtydz 2 12
flxujebmsx uqtdgrftlztyv 11 5
gzb ilzrfhmqg 15 6
qdjgwajtnhtydz rii 18 4
qgmfmkenwm uqtdgrftlztyv 2 1
oclhhwngwyzlitklsje ifprrbxlwylwgbn 18 12
uqtdgrftlztyv wcnrsanwi 11 12
mzrlrhtdnhntujhdrgej uqtdgrftlztyv 5 5
ilzrfhmqg ifprrbxlwylwgbn 8 6
qdjgwajtnhtydz uqtdgrftlztyv 3 7
oclhhwngwyzlitklsje rii 12 9
gzb oclhhwngwyzlitklsje 13 3
wcnrsanwi rii 20 3
mzrlrhtdnhntujhdrgej gzb
23
yqtcutygbaesyz dznxsnwnqcsxrvw 17 9
yqtcutygbaesyz dznxsnwnqcsxrvw 4 10
dznxsnwnqcsxrvw yqtcutygbaesyz 8 8
yqtcutygbaesyz dznxsnwnqcsxrvw 11 1
dznxsnwnqcsxrvw yqtcutygbaesyz 23 10
yqtcutygbaesyz dznxsnwnqcsxrvw 13 5
ffnbz dznxsnwnqcsxrvw 5 5
yqtcutygbaesyz ffnbz 16 11
dznxsnwnqcsxrvw yqtcutygbaesyz 19 7
yqtcutygbaesyz ffnbz 16 6
yqtcutygbaesyz ffnbz 23 3
yqtcutygbaesyz dznxsnwnqcsxrvw 8 4
dznxsnwnqcsxrvw yqtcutygbaesyz 14 5
ffnbz dznxsnwnqcsxrvw 12 3
yqtcutygbaesyz dznxsnwnqcsxrvw 6 1
ffnbz dznxsnwnqcsxrvw 12 12
yqtcutygbaesyz dznxsnwnqcsxrvw 9 11
yqtcutygbaesyz dznxsnwnqcsxrvw 24 9
ffnbz dznxsnwnqcsxrvw 6 5
ffnbz yqtcutygbaesyz 6 4
ffnbz dznxsnwnqcsxrvw 5 1
yqtcutygbaesyz dznxsnwnqcsxrvw 9 5
dznxsnwnqcsxrvw yqtcutygbaesyz 23 2
yqtcutygbaesyz ffnbz
12
fyluvjdcxzpoxp mrfah 5 2
atfp davw 16 10
atfp fyluvjdcxzpoxp 24 11
atfp davw 17 11
cubzrkcvjd mrfah 14 8
mrfah davw 19 11
davw cubzrkcvjd 13 9
davw fyluvjdcxzpoxp 19 9
fyluvjdcxzpoxp davw 3 10
mrfah atfp 5 11
fyluvjdcxzpoxp cubzrkcvjd 16 6
atfp davw 5 9
atfp fyluvjdcxzpoxp
10
jiudvvzvufsviijddwba lrhzeafqt 14 4
sktoolrgmt tumgmc 22 12
msv bscszalzqdrmbjrevsl 11 12
bscszalzqdrmbjrevsl mjvfvyomdlholakxhybw 21 11
msv mjvfvyomdlholakxhybw 6 3
mjvfvyomdlholakxhybw qtnmodvimcrw 14 8
qtnmodvimcrw wxvpquvtohui 1 10
mjvfvyomdlholakxhybw sktoolrgmt 14 6
mjvfvyomdlholakxhybw tumgmc 11 7
jiudvvzvufsviijddwba msv 15 12
mjvfvyomdlholakxhybw jiudvvzvufsviijddwba
15
mgpddzywu gprzjxwywriiatdyvgzm 23 5
mgpddzywu uqtdxnxskkjitw 14 5
mgpddzywu uqtdxnxskkjitw 12 5
uqtdxnxskkjitw mgpddzywu 23 6
gprzjxwywriiatdyvgzm uqtdxnxskkjitw 22 2
dzpplsrquittu gprzjxwywriiatdyvgzm 18 10
gprzjxwywriiatdyvgzm uqtdxnxskkjitw 15 5
mgpddzywu uqtdxnxskkjitw 15 5
uqtdxnxskkjitw gprzjxwywriiatdyvgzm 20 11
gprzjxwywriiatdyvgzm mgpddzywu 5 6
dzpplsrquittu gprzjxwywriiatdyvgzm 8 6
dzpplsrquittu mgpddzywu 15 6
dzpplsrquittu mgpddzywu 6 8
dzpplsrquittu gprzjxwywriiatdyvgzm 19 7
uqtdxnxskkjitw mgpddzywu 21 8
mgpddzywu gprzjxwywriiatdyvgzm
24
qwctrmkitrr puw 4 9
ppszrvtorceqgy ere 14 8
skrodlblolhhoexzto paujvrjjsl 23 10
xmjcmsjdsdtauvdb ibiwrauq 1 2
ere mjccumjk 20 4
ulqovctmj lqrimfpfghcurkkwv 24 8
qwctrmkitrr jfpmcdarahxungtzqv 8 2
skrodlblolhhoexzto uhrzxxzislbg 22 12
xmjcmsjdsdtauvdb ere 11 2
skrodlblolhhoexzto adciowcgimy 15 5
uhrzxxzislbg xmjcmsjdsdtauvdb 3 5
jfpmcdarahxungtzqv xmjcmsjdsdtauvdb 7 4
tlvnvglsclxeundytlkt ulqovctmj 11 6
jfpmcdarahxungtzqv paujvrjjsl 17 11
ppszrvtorceqgy adciowcgimy 18 1
ibiwrauq paujvrjjsl 22 7
ibiwrauq uhrzxxzislbg 1 12
skrodlblolhhoexzto mjccumjk 22 3
adciowcgimy xsqiocdhrgbadvmmpx 3 12
skrodlblolhhoexzto mjccumjk 7 9
ugn ffcdahh 16 5
adciowcgimy skrodlblolhhoexzto 9 12
ibiwrauq lqrimfpfghcurkkwv 22 6
uhrzxxzislbg paujvrjjsl 18 7
xsqiocdhrgbadvmmpx ppszrvtorceqgy
25
plcetebl kquonncpjuwzyqix 2 8
kquonncpjuwzyqix plcetebl 24 4
kquonncpjuwzyqix plcetebl 11 11
kquonncpjuwzyqix pizxqfaghi 14 3
plcetebl pizxqfaghi 6 10
kquonncpjuwzyqix pizxqfaghi 21 4
kquonncpjuwzyqix plcetebl 4 8
kquonncpjuwzyqix pizxqfaghi 19 9
plcetebl kquonncpjuwzyqix 22 9
pizxqfaghi kquonncpjuwzyqix 24 10
pizxqfaghi kquonncpjuwzyqix 23 2
kquonncpjuwzyqix plcetebl 1 2
kquonncpjuwzyqix pizxqfaghi 13 9
pizxqfaghi kquonncpjuwzyqix 2 11
plcetebl kquonncpjuwzyqix 5 11
plcetebl kquonncpjuwzyqix 3 8
kquonncpjuwzyqix pizxqfaghi 5 6
kquonncpjuwzyqix plcetebl 6 3
pizxqfaghi kquonncpjuwzyqix 22 12
kquonncpjuwzyqix pizxqfaghi 10 10
kquonncpjuwzyqix plcetebl 13 2
kquonncpjuwzyqix plcetebl 13 2
pizxqfaghi plcetebl 7 9
pizxqfaghi plcetebl 14 5
plcetebl kquonncpjuwzyqix 23 11
kquonncpjuwzyqix pizxqfaghi
4
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gbtekyrpoxnyaltjk gqkurnzobbycjgdek 13 9
gbtekyrpoxnyaltjk a 3 9
gbtekyrpoxnyaltjk gqkurnzobbycjgdek 1 11
gqkurnzobbycjgdek a
27
kzvqnjiyfqvyufqmsle ooh 18 4
ooh kzvqnjiyfqvyufqmsle 17 3
kzvqnjiyfqvyufqmsle ooh 6 10
kzvqnjiyfqvyufqmsle ooh 2 7
ooh kzvqnjiyfqvyufqmsle 22 9
kzvqnjiyfqvyufqmsle ooh 7 11
kzvqnjiyfqvyufqmsle ooh 16 7
kzvqnjiyfqvyufqmsle ooh 16 9
ooh kzvqnjiyfqvyufqmsle 16 2
kzvqnjiyfqvyufqmsle ooh 10 9
ooh kzvqnjiyfqvyufqmsle 17 6
ooh kzvqnjiyfqvyufqmsle 19 3
ooh kzvqnjiyfqvyufqmsle 3 9
kzvqnjiyfqvyufqmsle ooh 17 9
kzvqnjiyfqvyufqmsle ooh 20 7
ooh kzvqnjiyfqvyufqmsle 24 7
ooh kzvqnjiyfqvyufqmsle 23 8
ooh kzvqnjiyfqvyufqmsle 1 3
ooh kzvqnjiyfqvyufqmsle 4 7
ooh kzvqnjiyfqvyufqmsle 10 3
ooh kzvqnjiyfqvyufqmsle 5 6
kzvqnjiyfqvyufqmsle ooh 20 2
ooh kzvqnjiyfqvyufqmsle 1 11
ooh kzvqnjiyfqvyufqmsle 2 1
ooh kzvqnjiyfqvyufqmsle 24 7
kzvqnjiyfqvyufqmsle ooh 20 3
ooh kzvqnjiyfqvyufqmsle 13 8
kzvqnjiyfqvyufqmsle ooh
29
yxlivbtuhesj m 10 5
yxlivbtuhesj bdgfwygywvyxbg 14 3
bdgfwygywvyxbg m 6 3
bdgfwygywvyxbg m 22 12
yxlivbtuhesj bdgfwygywvyxbg 23 7
yxlivbtuhesj bdgfwygywvyxbg 14 7
yxlivbtuhesj m 5 11
yxlivbtuhesj bdgfwygywvyxbg 4 9
m bdgfwygywvyxbg 16 10
m yxlivbtuhesj 21 2
bdgfwygywvyxbg yxlivbtuhesj 2 1
bdgfwygywvyxbg yxlivbtuhesj 9 10
bdgfwygywvyxbg yxlivbtuhesj 20 11
bdgfwygywvyxbg yxlivbtuhesj 7 1
bdgfwygywvyxbg yxlivbtuhesj 5 11
yxlivbtuhesj bdgfwygywvyxbg 14 1
yxlivbtuhesj m 18 2
yxlivbtuhesj bdgfwygywvyxbg 22 11
yxlivbtuhesj m 2 5
bdgfwygywvyxbg m 9 10
bdgfwygywvyxbg m 15 7
yxlivbtuhesj bdgfwygywvyxbg 7 9
m bdgfwygywvyxbg 21 12
yxlivbtuhesj bdgfwygywvyxbg 20 11
m yxlivbtuhesj 24 9
bdgfwygywvyxbg yxlivbtuhesj 20 1
yxlivbtuhesj bdgfwygywvyxbg 20 4
bdgfwygywvyxbg m 23 5
yxlivbtuhesj bdgfwygywvyxbg 10 5
yxlivbtuhesj bdgfwygywvyxbg
18
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orjddfztuiwtyze hvsjhzqvjw 14 6
hvsjhzqvjw vaa 6 3
oojbxodkrvuk hvsjhzqvjw 15 5
hvsjhzqvjw oojbxodkrvuk 2 7
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hvsjhzqvjw vaa 14 6
hvsjhzqvjw vaa 3 7
hvsjhzqvjw oojbxodkrvuk 7 8
orjddfztuiwtyze vaa 16 2
orjddfztuiwtyze vaa 23 9
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vaa orjddfztuiwtyze 19 3
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oojbxodkrvuk hvsjhzqvjw 21 10
vaa hvsjhzqvjw
16
wreatqbf sgzdkk 16 1
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oloe e 4 5
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sgzdkk wreatqbf 1 11
oloe wreatqbf 14 8
sgzdkk oloe 17 11
wreatqbf mbksldofj 13 5
sgzdkk ojbws 8 2
wreatqbf cbgpio 22 10
sgzdkk e 10 12
wreatqbf cbgpio 1 1
oloe wreatqbf 1 7
cbgpio sgzdkk 21 5
sgzdkk wreatqbf
13
fuupzuuzzegchgqpjhw hxhomrzg 22 7
hxhomrzg midrfiyyofnijuoz 21 1
hxhomrzg fuupzuuzzegchgqpjhw 12 12
fuupzuuzzegchgqpjhw hxhomrzg 20 10
hcd hxhomrzg 16 11
hcd midrfiyyofnijuoz 11 5
midrfiyyofnijuoz hxhomrzg 12 11
fuupzuuzzegchgqpjhw hcd 22 9
midrfiyyofnijuoz hcd 6 10
hxhomrzg hcd 22 5
hcd midrfiyyofnijuoz 4 6
hcd hxhomrzg 13 7
fuupzuuzzegchgqpjhw hcd 19 8
midrfiyyofnijuoz hxhomrzg
6
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glzhtzmisttjbkbmncst czeyeiv 7 2
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czeyeiv glzhtzmisttjbkbmncst 8 2
glzhtzmisttjbkbmncst czeyeiv 14 8
glzhtzmisttjbkbmncst czeyeiv 9 4
czeyeiv glzhtzmisttjbkbmncst
16
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laejdxekdvyo rqqwemevvrvzd 2 12
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laejdxekdvyo djewehckpfowir 15 3
rqqwemevvrvzd lonozrnd 19 8
laejdxekdvyo djewehckpfowir 21 7
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djewehckpfowir lonozrnd 10 3
djewehckpfowir rqqwemevvrvzd 4 3
whkbfjrowibnhua laejdxekdvyo 16 7
whkbfjrowibnhua lonozrnd 6 6
lonozrnd laejdxekdvyo 11 8
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whkbfjrowibnhua rqqwemevvrvzd 23 5
djewehckpfowir whkbfjrowibnhua 5 12
lonozrnd djewehckpfowir

UVa's anwser:

Code: Select all

Test Case 1.
Vladimir needs 0 litre(s) of blood.
Test Case 2.
Vladimir needs 0 litre(s) of blood.
Test Case 3.
There is no route Vladimir can take.
Test Case 4.
There is no route Vladimir can take.
Test Case 5.
There is no route Vladimir can take.
Test Case 6.
There is no route Vladimir can take.
Test Case 7.
There is no route Vladimir can take.
Test Case 8.
There is no route Vladimir can take.
Test Case 9.
There is no route Vladimir can take.
Test Case 10.
There is no route Vladimir can take.
Test Case 11.
Vladimir needs 0 litre(s) of blood.
Test Case 12.
There is no route Vladimir can take.
Test Case 13.
Vladimir needs 0 litre(s) of blood.
Test Case 14.
Vladimir needs 0 litre(s) of blood.
Test Case 15.
Vladimir needs 0 litre(s) of blood.
Test Case 16.
Vladimir needs 0 litre(s) of blood.
Test Case 17.
Vladimir needs 0 litre(s) of blood.
Test Case 18.
There is no route Vladimir can take.
Test Case 19.
There is no route Vladimir can take.
Test Case 20.
There is no route Vladimir can take.
Test Case 21.
Vladimir needs 0 litre(s) of blood.
Test Case 22.
There is no route Vladimir can take.
Test Case 23.
There is no route Vladimir can take.
Test Case 24.
Vladimir needs 0 litre(s) of blood.
Test Case 25.
There is no route Vladimir can take.
Test Case 26.
There is no route Vladimir can take.
Test Case 27.
Vladimir needs 0 litre(s) of blood.
Test Case 28.
There is no route Vladimir can take.
Test Case 29.
Vladimir needs 0 litre(s) of blood.
Test Case 30.
There is no route Vladimir can take.
Test Case 31.
There is no route Vladimir can take.
Test Case 32.
There is no route Vladimir can take.
Test Case 33.
Vladimir needs 0 litre(s) of blood.
Test Case 34.
There is no route Vladimir can take.
Test Case 35.
There is no route Vladimir can take.
Test Case 36.
There is no route Vladimir can take.
Test Case 37.
Vladimir needs 0 litre(s) of blood.
Test Case 38.
Vladimir needs 0 litre(s) of blood.
Test Case 39.
Vladimir needs 0 litre(s) of blood.
Test Case 40.
Vladimir needs 0 litre(s) of blood.
Test Case 41.
Vladimir needs 0 litre(s) of blood.
Test Case 42.
Vladimir needs 0 litre(s) of blood.
Test Case 43.
Vladimir needs 0 litre(s) of blood.
Test Case 44.
Vladimir needs 0 litre(s) of blood.
Test Case 45.
Vladimir needs 0 litre(s) of blood.
Test Case 46.
Vladimir needs 0 litre(s) of blood.
Test Case 47.
Vladimir needs 0 litre(s) of blood.
Test Case 48.
Vladimir needs 0 litre(s) of blood.
Test Case 49.
Vladimir needs 0 litre(s) of blood.
Test Case 50.
Vladimir needs 0 litre(s) of blood.
Test Case 51.
Vladimir needs 0 litre(s) of blood.
Test Case 52.
Vladimir needs 0 litre(s) of blood.
Test Case 53.
Vladimir needs 0 litre(s) of blood.
Test Case 54.
Vladimir needs 0 litre(s) of blood.
Test Case 55.
Vladimir needs 0 litre(s) of blood.
Test Case 56.
Vladimir needs 0 litre(s) of blood.
Test Case 57.
Vladimir needs 0 litre(s) of blood.
Test Case 58.
Vladimir needs 0 litre(s) of blood.
Test Case 59.
Vladimir needs 0 litre(s) of blood.
Test Case 60.
Vladimir needs 0 litre(s) of blood.
Test Case 61.
Vladimir needs 0 litre(s) of blood.
Test Case 62.
Vladimir needs 0 litre(s) of blood.
Test Case 63.
Vladimir needs 0 litre(s) of blood.
Test Case 64.
Vladimir needs 0 litre(s) of blood.
Test Case 65.
Vladimir needs 0 litre(s) of blood.
Test Case 66.
Vladimir needs 0 litre(s) of blood.
Test Case 67.
Vladimir needs 0 litre(s) of blood.
Test Case 68.
Vladimir needs 0 litre(s) of blood.
Test Case 69.
Vladimir needs 0 litre(s) of blood.
Test Case 70.
Vladimir needs 0 litre(s) of blood.
Test Case 71.
Vladimir needs 0 litre(s) of blood.
Test Case 72.
Vladimir needs 0 litre(s) of blood.
Test Case 73.
Vladimir needs 0 litre(s) of blood.
Test Case 74.
Vladimir needs 0 litre(s) of blood.
Test Case 75.
Vladimir needs 0 litre(s) of blood.
Test Case 76.
Vladimir needs 0 litre(s) of blood.
Test Case 77.
Vladimir needs 0 litre(s) of blood.
Test Case 78.
Vladimir needs 0 litre(s) of blood.
Test Case 79.
Vladimir needs 0 litre(s) of blood.
Test Case 80.
Vladimir needs 0 litre(s) of blood.
Test Case 81.
Vladimir needs 0 litre(s) of blood.
Test Case 82.
Vladimir needs 0 litre(s) of blood.
Test Case 83.
Vladimir needs 0 litre(s) of blood.
Test Case 84.
Vladimir needs 0 litre(s) of blood.
Test Case 85.
Vladimir needs 0 litre(s) of blood.
Test Case 86.
Vladimir needs 0 litre(s) of blood.
Test Case 87.
Vladimir needs 0 litre(s) of blood.
Test Case 88.
Vladimir needs 0 litre(s) of blood.
Test Case 89.
Vladimir needs 0 litre(s) of blood.
Test Case 90.
Vladimir needs 0 litre(s) of blood.
Test Case 91.
Vladimir needs 0 litre(s) of blood.
Test Case 92.
Vladimir needs 0 litre(s) of blood.
Test Case 93.
Vladimir needs 0 litre(s) of blood.
Test Case 94.
Vladimir needs 0 litre(s) of blood.
Test Case 95.
Vladimir needs 0 litre(s) of blood.
Test Case 96.
Vladimir needs 0 litre(s) of blood.
Test Case 97.
Vladimir needs 0 litre(s) of blood.
Test Case 98.
Vladimir needs 0 litre(s) of blood.
Test Case 99.
Vladimir needs 0 litre(s) of blood.

and AC anwser: (my anwser is the same)

Code: Select all

Test Case 1.
There is no route Vladimir can take.
Test Case 2.
There is no route Vladimir can take.
Test Case 3.
There is no route Vladimir can take.
Test Case 4.
There is no route Vladimir can take.
Test Case 5.
There is no route Vladimir can take.
Test Case 6.
There is no route Vladimir can take.
Test Case 7.
There is no route Vladimir can take.
Test Case 8.
There is no route Vladimir can take.
Test Case 9.
There is no route Vladimir can take.
Test Case 10.
There is no route Vladimir can take.
Test Case 11.
Vladimir needs 0 litre(s) of blood.
Test Case 12.
There is no route Vladimir can take.
Test Case 13.
There is no route Vladimir can take.
Test Case 14.
There is no route Vladimir can take.
Test Case 15.
There is no route Vladimir can take.
Test Case 16.
There is no route Vladimir can take.
Test Case 17.
Vladimir needs 0 litre(s) of blood.
Test Case 18.
There is no route Vladimir can take.
Test Case 19.
There is no route Vladimir can take.
Test Case 20.
There is no route Vladimir can take.
Test Case 21.
There is no route Vladimir can take.
Test Case 22.
There is no route Vladimir can take.
Test Case 23.
There is no route Vladimir can take.
Test Case 24.
Vladimir needs 0 litre(s) of blood.
Test Case 25.
There is no route Vladimir can take.
Test Case 26.
There is no route Vladimir can take.
Test Case 27.
There is no route Vladimir can take.
Test Case 28.
There is no route Vladimir can take.
Test Case 29.
There is no route Vladimir can take.
Test Case 30.
There is no route Vladimir can take.
Test Case 31.
There is no route Vladimir can take.
Test Case 32.
There is no route Vladimir can take.
Test Case 33.
There is no route Vladimir can take.
Test Case 34.
There is no route Vladimir can take.
Test Case 35.
There is no route Vladimir can take.
Test Case 36.
There is no route Vladimir can take.
Test Case 37.
There is no route Vladimir can take.
Test Case 38.
There is no route Vladimir can take.
Test Case 39.
There is no route Vladimir can take.
Test Case 40.
There is no route Vladimir can take.
Test Case 41.
There is no route Vladimir can take.
Test Case 42.
There is no route Vladimir can take.
Test Case 43.
There is no route Vladimir can take.
Test Case 44.
There is no route Vladimir can take.
Test Case 45.
There is no route Vladimir can take.
Test Case 46.
There is no route Vladimir can take.
Test Case 47.
There is no route Vladimir can take.
Test Case 48.
There is no route Vladimir can take.
Test Case 49.
There is no route Vladimir can take.
Test Case 50.
There is no route Vladimir can take.
Test Case 51.
There is no route Vladimir can take.
Test Case 52.
There is no route Vladimir can take.
Test Case 53.
There is no route Vladimir can take.
Test Case 54.
There is no route Vladimir can take.
Test Case 55.
There is no route Vladimir can take.
Test Case 56.
There is no route Vladimir can take.
Test Case 57.
There is no route Vladimir can take.
Test Case 58.
There is no route Vladimir can take.
Test Case 59.
There is no route Vladimir can take.
Test Case 60.
There is no route Vladimir can take.
Test Case 61.
There is no route Vladimir can take.
Test Case 62.
There is no route Vladimir can take.
Test Case 63.
There is no route Vladimir can take.
Test Case 64.
There is no route Vladimir can take.
Test Case 65.
There is no route Vladimir can take.
Test Case 66.
There is no route Vladimir can take.
Test Case 67.
There is no route Vladimir can take.
Test Case 68.
There is no route Vladimir can take.
Test Case 69.
There is no route Vladimir can take.
Test Case 70.
There is no route Vladimir can take.
Test Case 71.
There is no route Vladimir can take.
Test Case 72.
There is no route Vladimir can take.
Test Case 73.
There is no route Vladimir can take.
Test Case 74.
There is no route Vladimir can take.
Test Case 75.
There is no route Vladimir can take.
Test Case 76.
There is no route Vladimir can take.
Test Case 77.
There is no route Vladimir can take.
Test Case 78.
There is no route Vladimir can take.
Test Case 79.
There is no route Vladimir can take.
Test Case 80.
There is no route Vladimir can take.
Test Case 81.
There is no route Vladimir can take.
Test Case 82.
There is no route Vladimir can take.
Test Case 83.
There is no route Vladimir can take.
Test Case 84.
There is no route Vladimir can take.
Test Case 85.
There is no route Vladimir can take.
Test Case 86.
There is no route Vladimir can take.
Test Case 87.
There is no route Vladimir can take.
Test Case 88.
There is no route Vladimir can take.
Test Case 89.
There is no route Vladimir can take.
Test Case 90.
There is no route Vladimir can take.
Test Case 91.
There is no route Vladimir can take.
Test Case 92.
There is no route Vladimir can take.
Test Case 93.
There is no route Vladimir can take.
Test Case 94.
There is no route Vladimir can take.
Test Case 95.
There is no route Vladimir can take.
Test Case 96.
There is no route Vladimir can take.
Test Case 97.
There is no route Vladimir can take.
Test Case 98.
There is no route Vladimir can take.
Test Case 99.
There is no route Vladimir can take.

so I still have no idea what is wrong with my code
but thank you for your anwser anyway

[brianfry713]

I forgot the number of routes in my previous post. Try this input:

Code: Select all

1
1
a b 6 12
a b

AC output:

Code: Select all

Test Case 1.
There is no route Vladimir can take.

[chylek]

I've already wrote another code - AC
now my old code got AC too, after one little change, thanks to your input
thank you very much