#include <bits/stdc++.h>
using namespace std;
int main()
{
int n;string s;
cin>>n>>s;
int red=0;int blue=0;
for(int i=0;i<n;i++)
{ if(s[i]=='R')red++;else blue++;
}
if(red>blue)
cout<<"Yes\n";
else
cout<<"No\n";
}