func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, xC = 0, XC = 0, i, f = 0;     char c;     char remain;     cin >> n;     string o =   ;     for (i = 0; i < n; i++) {       cin >> c;       if (c ==  x ) {         xC++;         o = o +  x ;         if (xC == n / 2) {           remain =  X ;           i++;           break;         }       } else {         XC++;         o = o +  X ;         if (XC == n / 2) {           remain =  x ;           i++;           break;         }       }     }     while (i < n) {       cin >> c;       if (c != remain) {         f++;       }       o = o + remain;       i++;     }     cout << f << endl;     cout << o;     return 0;   }   