#include <bits/stdc++.h>
using namespace std;
int main(){
    int n; cin>>n;
    string s; cin>>s;
    int x = 0;
    for(int i=0;i<n;i++){
        if(s[i]=='R') x++;
    }
    if(x>n-x) cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
}
