#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;
}
