#include <bits/stdc++.h>
using namespace std;
int main(){
	int r=0,b=0,n;
	cin>>n;
	char s[n];
	cin>>s;
	for(int i=0;i<n;i++){
		if(s[i]=='R') r++;
		else b++;
	}
	if(b<r) cout<<"Yes"<<endl;
	else cout<<"No"<<endl;
	return 0;
}
