func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:16777216 )   using namespace std;   bool isSquare(int r) {     return int(sqrt((double)r)) * int(sqrt((double)r)) == r;   }   bool check(int a, int b, int c, int d, int N, int M) {     int ans = 0;     ans += isSquare(a * a * (M - 1) + b * b);     ans += isSquare(a * a * (N - 1) + c * c);     ans += isSquare(b * b * (N - 1) + d * d);     ans += isSquare(c * c * (M - 1) + d * d);     return ans == 4;   }   int _127 = 100;   int main() {     int N, M;     cin >> N >> M;     int a, b, c, d;     do {       a = 1 + (rand() % _127);       b = 1 + (rand() % _127);       c = 1 + (rand() % _127);       d = 1 + (rand() % _127);     } while (!check(a, b, c, d, N, M));     for (long long i = 0; i < (int)N - 1; i++) {       for (long long j = 0; j < (int)M - 1; j++) {         cout << a <<    ;       }       cout << b << endl;     }     for (long long j = 0; j < (int)M - 1; j++) {       cout << c <<    ;     }     cout << d << endl;     return 0;   }   