func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 105;   int n, m;   char g[maxn][maxn];   int vis[3];   map<char, int> mp;   int main() {     mp[ R ] = 0;     mp[ G ] = 1;     mp[ B ] = 2;     scanf( %d%d , &n, &m);     for (int i = 0; i < n; i++) scanf( %s , g[i]);     bool ok = true;     if (g[0][0] == g[0][m - 1] && n % 3 == 0) {       int w = n / 3;       for (int i = 0; i < n && ok; i++) {         char x = g[i][0];         int but = i + w;         for (; i < but; i++)           for (int j = 0; j < m; j++)             if (g[i][j] != x) ok = false;         int id = mp[x];         if (vis[id]) {           ok = false;           break;         }         vis[id] = 1;         i--;       }     } else if (g[0][0] == g[n - 1][0] && m % 3 == 0) {       int w = m / 3;       for (int j = 0; j < m && ok; j++) {         char x = g[0][j];         int r = j + w;         for (; j < r; j++)           for (int i = 0; i < n; i++)             if (g[i][j] != x) ok = false;         int id = mp[x];         if (vis[id]) {           ok = false;           break;         }         vis[id] = 1;         j--;       }     } else       ok = false;     puts(ok ?  YES  :  NO );     return 0;   }   