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



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