#include <bits/stdc++.h>
using namespace std;

int main()
{
int i;
int a;
int b;
int c;
int iCntB;
int iCntC;

	cin >> a;
	cin >> b;
	cin >> c;

	iCntB = a / b;
	if( a % b != 0 ) iCntB++;

	iCntC = a / c;
	if( a % c != 0 ) iCntC++;

	if( iCntB * 2 < iCntC * 3 )
		cout << "NO" << endl;
	else
		cout << "YES" << endl;

	return 0;
}