func_code_string: #include <bits/stdc++.h>   using namespace std;   double EPS = 1e-9;   int INF = 1 << 30;   long long INFL = 1LL << 60;   int main() {     int n;     cin >> n;     string w;     cin >> w;     int ile = 0;     for (int i = 1; i < n; i += 2) {       if (w[i] ==  a  && w[i - 1] ==  a ) {         w[i] =  b ;         ile++;       }       if (w[i] ==  b  && w[i - 1] ==  b ) {         w[i] =  a ;         ile++;       }     }     cout << ile <<   n  << w;   }   