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

int main(){
    long long int a, b, c, num1, num2;

    cin >> a >> b >> c;

    if(a%b == 0){
        num1 = a/b;
    }else{
        num1 = a/b + 1;
    }
    if(a%c == 0){
        num2 = a/c;
    }else{
        num2 = a/c + 1;
    }

    if(3*num2 <= 2*num1){
        cout << "YES" << endl;
    }else{
        cout << "NO" << endl;
    }

    return 0;
}