#include<iostream>
#include<string>
using namespace std;

int main(){
	int N;
	int r=0;
	int b=0;
	string s;
	cin>>N;
	cin>>s;
	for(int i=0;i<N;++i){
		if(s[i]=='R')r++;
		else b++;
	}
	if(r>b)cout<<"Yes"<<endl;
	else cout<<"No"<<endl;
}
