func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     string colours;     cin >> n >> colours;     string collec[] = { RGB ,  RBG ,  BRG ,  BGR ,  GRB ,  GBR };     int index;     int max = INT_MAX;     for (int i = 0; i < 6; i++) {       int count = 0;       for (int j = 0; j < n; j++) {         if (colours[j] != collec[i][j % 3]) count++;       }       if (count < max) {         max = count;         index = i;       }     }     cout << max << endl;     for (int i = 0; i < n; i++) cout << collec[index][i % 3];   }   