#include <iostream>
using namespace std;
int main(int argc, char* argv[])
{
	int A,B,C;
	cin>>A>>B>>C;
	int AB,AC;
	AB=A/B;
	if (A%B!=0){
		AB++;
	}
	AC=A/C;
	if (A%C!=0){
		AC++;
	}

	if (3*AC<=2*AB){
		cout<<"YES"<<endl;
	}else{
		cout<<"NO"<<endl;
	}
	return 0;
}