func_code_string: #include <bits/stdc++.h>   using namespace std;   int matrix[105][105];   int vis[105][105];   int main() {     int n, k;     while (scanf( %d%d , &n, &k) != EOF) {       memset(matrix, 0, sizeof(matrix));       memset(vis, 0, sizeof(vis));       if (k > n * n) {         printf( -1 n );         continue;       }       for (int i = 1; i <= n; i++) {         for (int j = 1; j <= n; j++) {           if (!vis[i][j] && k) {             if (i == j) {               matrix[i][j]++;               vis[i][j] = 1;               k--;             } else if (k >= 2) {               matrix[i][j]++;               matrix[j][i]++;               vis[i][j] = vis[j][i] = 1;               k -= 2;             }           }         }       }       if (k) {         printf( -1 n );         continue;       }       for (int i = 1; i <= n; i++) {         for (int j = 1; j <= n; j++) {           if (j == n) {             printf( %d n , matrix[i][j]);           } else {             printf( %d  , matrix[i][j]);           }         }       }     }   }   