#include <iostream>
using namespace std;

void exp(int a,int bc,int *n)
{
    *n = a / bc;
    if(a % bc != 0) *n += 1;
    return;
}

int main()
{
    int a,b,c;
    cin >> a >> b >> c;

    int n1,n15;
    exp(a,b,&n1);
    exp(a,c,&n15);

    cout << (n15 <= (float)n1 * 2/3 ? "YES" : "NO") << endl;
    
    return 0;
}