func_code_string: #include <bits/stdc++.h>   using namespace std;   int n, m, a[105][105];   inline int get(int x, int y) {     bool vis[11];     for (register int i = 0; i <= 10; i++) vis[i] = 0;     vis[a[x - 1][y]] = vis[a[x + 1][y]] = vis[a[x][y - 1]] = vis[a[x][y + 1]] = 1;     for (register int i = 1; i <= 10; i++) {       if (!vis[i]) return i;     }     return 0;   }   inline void draw(int x, int y, int p, int sign) {     for (register int i = 0; i < p; i++) {       for (register int j = 0; j < p; j++) {         a[x + i][y + j] = sign;       }     }   }   inline void slove(int x, int y) {     if (y > m) {       y = 1;       x = x + 1;     }     if (x > n) return;     if (a[x][y]) {       slove(x, y + 1);       return;     }     int p = 1, sign = get(x, y);     while (1) {       if (x + p > n || y + p > m) break;       if (a[x][y + p]) break;       int tmp = get(x, y + p);       if (tmp != sign) break;       p++;     }     draw(x, y, p, sign);     slove(x, y + 1);   }   int main() {     scanf( %d%d , &n, &m);     slove(1, 1);     for (register int i = 1; i <= n; i++) {       for (register int j = 1; j <= m; j++) {         printf( %c , (a[i][j] - 1 +  A ));       }       printf(  n );     }     return 0;   }   