#include<iostream>
#include<string>

using namespace std;

int main()
{
	int n;
	cin >> n;
	string s;
	cin >> s;
	int count=0;
	for(int i=0;i<n;i++)
		if(s[i]=='R')
			count++;
	cout << (count>n/2 ? "Yes" : "No") << endl;
}