#include <cstdio> #include <cstring> #include <iostream> #include <string> #include <cmath> #include <bitset> #include <vector> #include <map> #include <set> #include <queue> #include <deque> #include <algorithm> #include <complex> #include <unordered_map> #include <unordered_set> #include <random> #include <cassert> #include <fstream> #define popcount __builtin_popcount using namespace std; typedef long long int ll; typedef pair<int, int> P; int main() { int n; cin>>n; string s; cin>>s; int ans=0; for(int i=0; i<n; i++){ if(s[i]!='M') continue; for(int j=1; i-j>=0 && i+j<n; j++){ if(s[i-j]=='U' && s[i+j]=='G'){ ans++; } } } cout<<ans<<endl; return 0; }