#include <bits/stdc++.h>   #pragma GCC optimize( Ofast )   #pragma GCC target( sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,fma )   #pragma GCC optimize( unroll-loops )   using namespace std;   long long MOD = 998244353;   double eps = 1e-12;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     int n;     cin >> n;     string s;     cin >> s;     int coins = 0;     int x, y;     if (s[0] ==  U ) {       x = 0;       y = 1;     } else {       x = 1;       y = 0;     }     for (int i = 1; i < n; i++) {       if (s[i] ==  U ) {         if (x == y) {           if (s[i - 1] ==  U ) coins++;         }         y++;       } else {         if (x == y) {           if (s[i - 1] ==  R ) coins++;         }         x++;       }     }     cout << coins;     return 0;   }   