func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     while (cin >> t) {       string a;       cin >> a;       int s = 0;       for (int i = 0; i < t - 1;) {         if (a.at(i) == a.at(i + 1)) {           if (a.at(i) ==  a )             a.at(i) =  b ;           else             a.at(i) =  a ;           s++;         }         i += 2;         if (i >= a.size()) break;       }       cout << s << endl << a << endl;     }     return 0;   }   