#include <bits/stdc++.h>   using namespace std;   int main() {     int N;     ios_base::sync_with_stdio(0);     cin >> N;     string K;     cin >> K;     int zm = N;     for (int i = 1; i < N; i++) {       if (K[i] != K[i - 1]) {         zm--;         if (i < N - 1) K[i] = K[i + 1];       }     }     cout << zm;   }   