#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;
	return 0;
}