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

int main(){
    int a,b,c;
    cin >> a >> b >> c;
    int res1=0;
    int res2=0;
    int k=0,l=0;
    while(k < a){
        k += b;
        res1++;
    }
    while(l < a){
        l += c;
        res2++;
    }
    if(res1 * 2 / 3 >= res2) cout << "YES" << endl;
    else cout << "NO" << endl;
    return 0;
}