func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     string a, b;     int n;     cin >> n;     cin >> a >> b;     int ans = 0;     for (int i = 0; i < n - 1; i++) {       if (a[i] != b[i]) {         ans++;         if (a[i + 1] != b[i + 1] && a[i] != a[i + 1]) {           swap(a[i], a[i + 1]);         } else           a[i] = b[i];       }     }     if (a[n - 1] != b[n - 1]) ans++;     printf( %d n , ans);     return 0;   }   