#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,i,s=0,k=0; char c; cin>>n; for(i=0;i<n;i++) { cin>>c; if(c=='U') k++; else k--; if(k==0&&c=='U') s++; } cout<<s; return 0; }