#include "iostream"
#include <string>
using namespace std;
int main()
{
	int n,r=0;
	string s;
	cin >> n >> s;
	for(int i=0;i<n;i++){
		if(s[i] == 'R')r++;
	}
	cout << ((r > n-r)?"Yes":"No") << endl;
	return 0;
}