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


int main()
{
	int n;
	string s;
	cin>>n>> s;
	int cnt = 0;
	for(int i=0;i<n;i++)if(s[i]=='R'){
		cnt++;
	}
	if(cnt > n-cnt){
		cout<<"Yes"<<endl;
	}else{

		cout<<"No"<<endl;
	}


	return 0;
}
