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