#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
typedef long long ll;

int main(){
	double a,b,c; cin>>a>>b>>c;
	if((2*a)/(3*b)>a/c) cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
}