#include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string s;     cin >> s;     int res = 0;     for (int i = 0; i < n; i++) {       res++;       if (i == n - 1) break;       if (s[i] != s[i + 1]) {         i++;       }     }     cout << res <<   n ;   }   