#include <iostream>
using namespace std;
int main(void){
    int n,r=0;
    string s;
    cin>>n>>s;
    for(int i=0;i<n;i++){
        if(s[i]=='R')r++;
    }
    if(r>n-r){
        cout<<"Yes"<<endl;
    }else{
        cout<<"No"<<endl;
    }
}
