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  1. #include <stdio.h>
  2. int main ()
  3. {
  4.     int N,i,j;
  5.     scanf("%d", &N);
  6.  
  7.     int a[N+1][N+1];
  8.  
  9.     for(int i =0; i<N; i++){
  10.         for(int j=0; j<N; j++){
  11.             scanf("%d", &a[i][j]);
  12.         }
  13.     }
  14.     int cnt=0;
  15.     for( i =0; i<N; i++){
  16.         for( j=0; j<N; j++){
  17.             if(i == j & a[i][j] == 1)
  18.             {
  19.                 cnt++;
  20.             }
  21.         }
  22.  
  23.     }
  24.     if (cnt == N) printf("YES");
  25.     else printf("NO");
  26. }
  27.  
  28.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin 
5
1 0 0 0 0
0 1 0 0 0
0 0 1 0 0
0 0 0 1 0
0 0 0 0 1
stdout 
YES
https://ideone.com/JX77Pd
language:
C (gcc 8.3)
created:
3 days ago
visibility:
public

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