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