#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; scanf("%d",&n); char s[n]; scanf("%s",&s); int count =0; int c =0; for(int i=0;i<n;i++){ if((int)s[i]==68){ count--; } else{count++; if(count ==0){c++;} } } cout<<c; return 0; }