#include <bits/stdc++.h>
using namespace std;
int main(){
	int n, r, b;
	cin>>n;
	string s;
	cin>>s;
	r = 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;
	return 0;
}
