#include <iostream>

using namespace std;

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