#include<iostream>
using namespace std;
int main(){
	int n;
	cin >> n;
	string s;
	cin >> s;
	int red=0;
	for(int i=0;i<n;i++){
		if(s[i]=='R') red++;
	}
	if(red>n/2) cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}
