#include <iostream>
#define ll long long
using namespace std;

int main() {
	ll n, r, b;
	string s;
	cin >> n;
	scanf("%s", s);
	r = 0;
	b = 0;
	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;
}