#include <bits/stdc++.h>   using namespace std;   int main(int argc, char const *argv[]) {     int n;     cin >> n;     char str[n + 2];     cin >> str;     if (n == 1) {       cout << 0 << endl;       return 0;     }     int current = 0;     int previous = 0;     if (str[0] ==  U )       current++;     else       current--;     int count = 0;     int sign = (current > 0 ? 1 : -1);     for (int i = 1; i < n; i++) {       previous = current;       if (str[i] ==  U )         current++;       else         current--;       if (previous == 0 && sign != current) {         count++;         sign = current;       }     }     cout << count << endl;     return 0;   }   