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

int main()
{
	int a, b, c;
	scanf("%d %d %d", &a, &b, &c);
	
	int n = a / b + !!(a % b);
	int m = a / c + !!(a % c);
	if (n * 2 >= m * 3) puts("YES");
	else puts("NO");
}