#include <cmath> #include <cstdio> #include <vector> #include <iostream> #include <algorithm> using namespace std; int main() { /* Enter your code here. Read input from STDIN. Print output to STDOUT */ int n; cin>>n; string s; cin>>s; int pre=0; int a[n]; for(int i=0;i<n;i++) { if(s[i]=='U') a[i]=pre+1; else a[i]=pre-1; pre=a[i]; } int cnt=0; for(int i=0;i<n;i++) { if(a[i]<0) { i++; while(a[i]<0 && i<n){ i++; } if(i==n){ cout<<cnt; return 0; } cnt++; } } cout<<cnt; return 0; }