#include<iostream>
using namespace std;
int main()
{
	int n,r=0,b=0;
	string s;
	cin>>n>>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;
	return 0;
}