func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long N = 305;   long long n, k;   long long a[N][N], rows[N], cols[N];   long long sqr(long long x) { return x * x; }   int32_t main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     ;     long long t;     cin >> t;     while (t--) {       cin >> n >> k;       for (long long i = 0; i < n; i++) {         rows[i] = cols[i] = 0;         for (long long j = 0; j < n; j++) a[i][j] = 0;       }       long long sti = 0, i = 0, j = 0;       while (k > 0) {         if (a[i][j]) {           sti++;           i = sti, j = 0;         } else {           a[i][j] = 1;           rows[i]++;           cols[j]++;           i++, j++;           i %= n;           j %= n;           k--;         }       }       long long ans = 0;       sort(rows, rows + n);       sort(cols, cols + n);       ans += sqr(rows[n - 1] - rows[0]) + sqr(cols[n - 1] - cols[0]);       cout << ans <<   n ;       for (long long i = 0; i < n; i++) {         for (long long j = 0; j < n; j++) cout << a[i][j];         cout <<   n ;       }     }     return 0;   }   