#include <bits/stdc++.h>   using namespace std;   const int inf = 0x3f3f3f3f;   const double pi = acos(-1.0);   const int N = 1e5 + 10;   const int mod = 100;   int main() {     string str;     int n, ans;     cin >> n >> str;     ans = n;     for (int i = 0; i < n - 1; i++) {       if (str[i] ==  U  && str[i + 1] ==  R ) {         ans--;         i++;       } else if (str[i] ==  R  && str[i + 1] ==  U ) {         i++;         ans--;       }     }     cout << ans << endl;     return 0;   }   