#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll inf=144494;
ll mod=1000000007;
int main(){
    ll a,b,c;
    cin >> a >> b >> c;
    ll x=0;
    if (a%b==0)
    {
        x=a/b;
    }else{
        x=(a/b)+1;
    }
    ll y;
    if (a%c==0)
    {
        y=a/c;
    }else{
        y=a/c+1;
    }
    ll z=y*3-x*2;
    if (z>0)
    {
        cout << "NO" << endl;
    }else{
        cout << "YES" << endl;
    }
    
}