#include<iostream> #include <stdio.h> #include<algorithm> using namespace std; #define rep(i,a,n) for (int i=a;i<n;i++) #define pb push_back #define mp make_pair typedef long long ll; int main() { int n; scanf("%d\n",&n); char c; int sum=0,ans=0; for(int i=0;i<n;i++) { scanf("%c",&c); if(sum==0&&c=='D') ans++; if(c=='U') sum++; if(c=='D') sum--; } printf("%d\n",ans); return 0; }