514 - Rails

[moxlotus]

Below is my code for this problem.
I have passed all the test cases on this thread but still getting the WA.
Whats wrong with my formatting?? >.<

Code: Select all

import java.util.*;

public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		LinkedList<Integer> original;
		LinkedList<Integer> permutation;
		Stack<Integer> stack;
		int noOfCoaches = sc.nextInt();
		boolean match;

		while(noOfCoaches != 0)
		{
			while(true)
			{
				original = new LinkedList<Integer>();
				permutation = new LinkedList<Integer>();
				stack = new Stack<Integer>();
				match = true;
				int num = sc.nextInt();
				if(num == 0)
				{
					System.out.printf("\n");	
					break;
				}
				permutation.offer(num);
				for(int i = 0; i < noOfCoaches; i++)
				{
					original.offer(i+1);
				}
				for(int i = 1; i < noOfCoaches; i++)
				{
					permutation.offer(sc.nextInt());
				}
				while(original.size() > 0 && match)
				{
					stack.push(original.poll());
					while(stack.peek() != permutation.peek() && original.size() > 0)
					{
						stack.push(original.poll());
					}
					while(!stack.empty() && match)
					{
						if(stack.peek() == permutation.peek())
						{
							stack.pop();
							permutation.poll();
						}
						else if(original.peek() != null)
						{
							break;
						}
						else
						{
							match = false;	
						}
					}
				}

				if(match) System.out.printf("Yes\n");	
				else System.out.printf("No\n");	
			}
			noOfCoaches = sc.nextInt();
		}	
	}
}

One of the sample input from the here

Code: Select all

5
1 2 3 4 5
5 4 1 2 3
0
6
6 5 4 3 2 1
5 6 4 3 2 1
1 2 3 4 5 6
0
10
1 2 3 4 5 10 9 8 7 6
0
0

Below is my output

Code: Select all

Yes
No

Yes
Yes
Yes

Yes

[lasia]

Code: Select all

#include<stdio.h>
#include<string.h>
#define MAXN 1000 + 10
int n, target[MAXN];
char string[MAXN];

void game(int n)
{
        int stack[MAXN], top = 0;
        int A = 1, B = 1;
        int ok = 1;
        while(B <= n) {
                if(A == target[B]){ A++; B++; }
                else if(top && stack[top] == target[B]){ top--; B++; }
                else if(A <= n) stack[++top] = A++;
                else { ok = 0; break; }
        }
        printf("%s\n", ok ? "Yes" : "No");
}

int main() {
  int i, n = 0;
  char *pch;
  int c, flag = 0;
  while(gets(string)) {
        i = 1;
        memset(target, 0, sizeof(target));
        pch = strtok(string, " ");
        while(pch != NULL){
                sscanf(pch, "%d", &c);
                target[i] = c;
                pch = strtok(NULL, " ");
                i++;
        }
        if(i == 2){
                if(target[1] != 0 && flag == 0){
                        n = target[1];
                        flag = 1;
                }else if(target[1] == 0 && flag == 1){
                        printf("\n");
                        flag = 0;
                }
        }
        else
                game(n);
  }
  return 0;
}

I tried all the sample input and get right output on my machine. But I kept getting Runtime error after submitting. Any clue? Thanks in advance.

[brianfry713]

Describe your algorithm if it's different than mine.
I keep a stack for the station. Look for the next train in the requested order. If it's not at the top of the stack, then push the next trains in sequential order onto the stack.

[brianfry713]

How many characters are in the string of the numbers 1 through 1000 separated by a space?

[moxlotus]

My algorithm maintains 2 queues and 1 stack. One for the original sequence and the other is the permuted sequence. And the stack is used for reversing the coach. So I will start from the first original coach and start moving it to the stack till the top of the stack is the same as the first coach in the permuted sequence. after which I will start to pop the permuted sequence with the stack till the top of the stack is different from the first coach in the permuted sequence.
This thing is repeated till the original queue is emptied. If the permuted queue is not emptied, then its impossible.

[brianfry713]

PM sent

[brianfry713]

Input:

Code: Select all

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

AC output:

Code: Select all

No
No
No
No
No
No
No
No

No
No
No
No
No
No

No

No
No
No
No
No
No
No
No
No
No

No
No
No
No
No
No
No
No
No
No

No
No
No
No
No
No
No
No
No
No

No
No
No
No
No
No

No
No
No
No
No
No
No
No
No

No

Yes
No
No

No
No
No
No
No
No
No

Yes

No
No
No
No
No
No
No
No

No
No
No
No
No
No
No

[shipu_a]

input:

Code: Select all

10
1 2 5 4 6 3 8 9 10 7
7 10 9 8 3 6 4 5 2 1
0
3
1 3 2
2 3 1
0
6
4 6 5 3 2 1
5 4 3 1 2 6
6 5 4 2 3 1
0
0

output:

Code: Select all

Yes
No

Yes
Yes

Yes
No
No

[abcman13]

Could someone help me find the reason why this fails? It has passes all the test cases on this thread but is wrong according to the judge.

Algorithm:
1. Receive max value (t)
2. Checks whether it is necessary to print the extra line to seperate test cases.
3. Recieves first value of permutation and verifies that it is not 0.
4. Initiates i = 1.
5. If 1 < n, it pushes all the integers 1 through n-1 into the stack.
6. We 'discard' n by skipping to n+1.
7. We have read 1 of the elements of the permutation, it is necessary to verify that t is greater than c (1 at this moment). As long as it is, we need to keep checking the stack and the 'queue' we have going.
8. During this inner loop, we read the next value n. If the top element of the stack is n, then we pop it from the stack and continue.
However, if it's not and n is less than the value of i, then the given permutation is not possible, due to the fact that is was not on top of the stack and the only cars remaining on the 'queue' are larger than it. Knowing that it is not possible, I proceed to read the remaining input for the test case and reset the value of c = 0. I output "No" and break out of the loop.
Now, if the two previous cases are false, then we can conclude that n must still be on the 'queue', now we proceed to put all of the values i through n-1 on the stack, and 'discard' n. The front of the queue is now n+1. We continue going through the loop.
9. We check if c is not 0, since c == 0 when it prints "No", then this will print "Yes" when a permutation is possible.

Code: Select all

Accepted. Thank you.
}

[brianfry713]

Print a blank line at the end of the output.

[triplemzim]

Why getting RE ??? Please help...

Code: Select all

ACCEPTED

[brianfry713]

Your code is throwing a seg fault on the sample input on line 29:
int f=q.front();

[triplemzim]

Thanks.. i got the point... But would you please tell me how to find out such kind of errors (if there is any specific process to find) ??

[brianfry713]

If you just ran your code on the sample input you probably would have gotten a seg fault. I used the g++ compiler in LINUX. To see where the seg fault is I used the gdb debugger.

[triplemzim]

thanks... brianfry713