#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 */ long long n,c=0,d=0,i; cin>>n; char a[1000000]; for(i=0;i<n;i++) cin>>a[i]; for(i=0;i<n;i++) { if(a[i]=='U') c++; else c--; if(c==0 && a[i]=='U') d++; } cout<<d; return 0; }