537 - Artificial Intelligence?

[brianfry713]

Print a blank line at the end of the output.

[uvasarker]

Guru,
It's not working.
I have test more with the following test cases:
Input:

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10
bla bla bla lightning strike I=2A bla bla bla P=2.5MW bla bla voltage?
If the voltage is U=200V and the current is I=4.5A, which power is generated?
A light-bulb yields P=100W and the voltage is U=220V. Compute the current, please.
gU=200VI=4.5A.
gU=220VP=100.00W.
tP=2.5MWI=2A.
PU=200VUI=4.5A.5W
IP=100WPU=220VI.5A
bla bla bla P=lightning st200rike I=2eA 200bla bla bla P=2.5MW bla bl100a I=voltage?
P=1WU=1V

Output:

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Problem #1
U=1250000.00V

Problem #2
P=900.00W

Problem #3
I=0.45A

Problem #4
P=900.00W

Problem #5
I=0.45A

Problem #6
U=1250000.00V

Problem #7
P=900.00W

Problem #8
I=0.45A

Problem #9
U=1250000.00V

Problem #10
I=1.00A

I have made two program for this problem. But judge verdict give WA WA WA.
Program 1 with gets() function:

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Removed

Program 2 with only string:

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#include <cstdio>
#include <cstring>
#include <cctype>
#include <iostream>
using namespace std;
int main()
{
    int T, cas=0;
    //freopen("in-537.txt","r",stdin);
    //freopen("out-537.txt","w",stdout);
    double P=0.0, U=0.0, I=0.0, tmp=0.0;
    scanf("%d\n",&T);
    while(T)
    {
		char s[1000], ch;
		scanf("%s%c",s,&ch);
		int ln=strlen(s), k=0, m=0, M=0, eq=0, PP=0, VV=0, II=0;
		for(int i=0 ; i<ln ; i++)
		{
		    if( (s[i]=='=') && (s[i-1]=='I' || s[i-1]=='P'|| s[i-1]=='U') && (s[i+1]>='0' && s[i+1]<='9') ) eq++;
		}
		float d=1.0;
		if(eq>0)
		{
                long nm=0, dv=0, fag=0;
                for(int i=0 ; i<ln ; i++)
                {
                    		    if(s[i]=='m') m=1;
                                if(s[i]=='M') M=1;
                                if(s[i]=='k') k=1;
                                if(s[i]=='P' && s[i+1]=='=') PP=1;
                                if(s[i]=='U' && s[i+1]=='=') VV=1;
                                if(s[i]=='I' && s[i+1]=='=') II=1;

                        if( s[i]>='0' && s[i]<='9' )
                        {
                            if(fag==1){dv=dv*10; d=(float)dv;}
                            nm=nm*10+(int)s[i]-48;
                        }
                        if( s[i]=='.' )
                        {
                            dv=1;
                            fag=1;
                        }

                        if(s[i]=='A' || s[i]=='W' || s[i]=='V')
                        {
                                tmp=(float)nm/d;
                                //printf("%lf m=%d M=%d k=%d\n",tmp,m,M,k);
                                if(PP==1){
                                    P=tmp;
                                    if(m==1) P=P/1000.0;
                                    else if(M==1) P=P*1000000.0;
                                    else if(k==1) P=P*1000.0;
                                }
                                else if(VV==1){
                                    U=tmp;
                                    if(m==1) U=U/1000.0;
                                    else if(M==1) U=U*1000000.0;
                                    else if(k==1) U=U*1000.0;
                                }
                                else if(II==1){
                                    I=tmp;
                                    if(m==1) I=I/1000.0;
                                    else if(M==1) I=I*1000000.0;
                                    else if(k==1) I=I*1000.0;
                                }
                                PP=0; VV=0; II=0; k=0; m=0; M=0;
                                nm=0; dv=0; fag=0; d=1.0;
                        }
                }
		}

            if(ch=='\n' || ln==0){
                    if(cas>0) printf("\n");
                    printf("Problem #%d\n",++cas);
                    if(P==0.0){
                        P=U*I;
                        printf("P=%.2lfW\n",P);
                    }
                    else if(U==0.0){
                        U=P/I;
                        printf("U=%.2lfV\n",U);
                    }
                    else if(I==0.0){
                        I=P/U;
                        printf("I=%.2lfA\n",I);
                    }
                P=0.0; U=0.0; I=0.0; tmp=0.0;
                T--;
            }
    }
    return 0;
}

I am frustrated.

[brianfry713]

I only looked at your first program. Try input:
I=1A P=0W

Don't use floats, stick with doubles.

[uvasarker]

Thanks Guru,
Finally, I got accccc after 10 submissions,
using double.

[lasia]

Got WA lots of times but still cannot figure out. Please help. Thank you in advance!

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#include<stdio.h>
#include<string.h>
#define MAXN 500+2

char line1[MAXN];
double num[2] = {0.0, 0.0};
char unit[2] = {'0', '0'};
char prefix[2] = {'0', '0'};

void dataProcess(char unit1, double num1, char unit2, double num2)
{
        if(unit1 == 'W' && unit2 == 'V')
		printf("I=%.2lfA\n", (1.0 * num1) / (1.0 * num2));
        else if(unit1 == 'V' && unit2 == 'W')
		printf("I=%.2lfA\n", (1.0 * num2) / (1.0 * num1));
        else if(unit1 == 'W' && unit2 == 'A')
		printf("U=%.2lfV\n", (1.0 * num1) / (1.0 * num2));
        else if(unit1 == 'A' && unit2 == 'W')
		printf("U=%.2lfV\n", (1.0 * num2) / (1.0 * num1));
        else
		printf("P=%.2lfW\n", 1.0 * num1 * num2);
}

double conversion(double num, char prefix)
{
	switch(prefix){
		case 'm':
			num *= 0.001;
		case 'k':
			num *= 1000;
		case 'M':
			num *= 1000000;
	}
	return num;
}

int main()
{
	int nTest = 0;
	int i = 0, j = 1;
	scanf("%d", &nTest);
	getchar();
	while(nTest--){
		i = 0;
		memset(num, 0.0, sizeof(num));
		memset(unit, 0, sizeof(unit));
		memset(prefix, 0.0, sizeof(prefix));

		fgets(line1, MAXN, stdin);

		char * pch;
		pch = strpbrk (line1, "=");
		while (pch != NULL)
		{
			if(unit[i] == 'm'|'k'|'M'){
				sscanf(pch+1, "%lf %[mkM] %[VAW]", &num[i], &prefix[i], &unit[i]);
				num[i] =  conversion(num[i], prefix[i]);
			}
			pch = strpbrk (pch+1,"=");
			i++;
		}

		printf("Problem #%d\n", j++);
		dataProcess(unit[0], num[0], unit[1], num[1]);
		if(nTest)
			printf("\n");
	
	}
	
	return 0;
}

[brianfry713]

Print a blank line after the last test case.

[lasia]

Print a blank line after the last test case.

I did but still WA. Any other suggestion?

[brianfry713]

Your code doesn't match the sample I/O.

[lasia]

Your code doesn't match the sample I/O.

It did match on my pc though. Would you please paste the output on your machine? Thank you.

[brianfry713]

https://ideone.com/kHaBHL

Your output for the sample input:

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Problem #1
P=900.00W

Problem #2
P=22000.00W

Problem #3
P=5000000.00W

[kamia]

I have tried several test cases, but still fail to ac, any idea? Thanks a lot!!

Code: Select all

#define RUN
#ifdef RUN

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <string>
#include <iostream>
#include <sstream>
#include <map>
#include <set>
#include <vector>
#include <list>
#include <cctype> 
#include <algorithm>
#include <utility>
#include <math.h>

using namespace std;

#define MAXN 105
string buf;


double getValue(int loc){
	int i;
	string val;
	double c = 1;
	for(i=loc+1; i<buf.length(); i++){
		if(isdigit(buf[i]) || buf[i]=='.' || buf[i]=='-' || buf[i]=='e' ){
			val += buf[i];
		}
		else if(buf[i] == 'm'){
			c = 1e-3;
		}
		else if(buf[i] == 'k'){
			c = 1e3;
		}
		else if(buf[i] == 'M'){
			c = 1e6;
		}
		else{
			break;
		}
	}

	//cout << "val.c_str():" << val.c_str() << endl;
	double ret = atof(val.c_str())*c;
	
	if(ret == 0){
		ret = 0;
	}
	return ret;
}


void play(){
	//cout << buf << endl;

	int loc1 = buf.find("=");
	//cout << loc1 << endl;

	int loc2 = buf.find("=", loc1+1);
	//cout << loc2 << endl;

	bool useU = false, useI = false, useP = false;
	double U = 0, I = 0, P = 0;
	switch (buf[loc1-1])
	{
	case 'U':
		U = getValue(loc1);
		useU = true;
		break;
	case 'I':
		I = getValue(loc1);
		useI = true;
		break;
	case 'P':
		P = getValue(loc1);
		useP = true;
		break;
	}

	switch (buf[loc2-1])
	{
	case 'U':
		U = getValue(loc2);
		useU = true;
		break;
	case 'I':
		I = getValue(loc2);
		useI = true;
		break;
	case 'P':
		P = getValue(loc2);
		useP = true;
		break;
	}

	if(!useU){
		printf("U=%.2lfV\n", (P/I));
	}
	else if(!useI){
		printf("I=%.2lfA\n", (P/U));
	}
	else if(!useP){
		printf("P=%.2lfW\n", (U*I));
	}
}


int main(){

#ifndef ONLINE_JUDGE
	freopen("537.in", "r", stdin);
	freopen("537.out", "w", stdout);
#endif

	int n;
	bool p = false;
	scanf("%d", &n);
	getchar();
	for(int i=0; i<n; i++){
		if(p){
			printf("\n");
		}
		getline(cin, buf);
		//cout << buf << endl;
		printf("Problem #%d\n", i+1);
		play();
		p = true;
	}

}


#endif

[brianfry713]

Print a blank line after the last test case.

[kamia]

Print a blank line after the last test case.

Brilliant!! I thought I only need to print out only one blank line after line test case, but in fact, I need to print 2 blank lines!

Thanks again!

[fubar]

Hi Everyone, my program works well with the test cases in the UVA page but when I submit the problem I get WA, why? Thanks a lot.
Edit: AC, Thanks

[brianfry713]

Doesn't match the sample I/O.