#include<bits/stdc++.h>
using namespace std;

int main(){
  int N;
  cin >> N;
  string s;
  cin >> s;
  int r=0,b=0;
  for(int i=0;i<N;i++){
    if(s[i]=='R'){r++;}
    else{b++;}
  }
  if(r>b){cout << "Yes" << endl;}
  else{cout << "No" << endl;}
}