#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(a) (a).begin(),(a).end()

int main(){
    int a,b,c;cin>>a>>b>>c;
    //2a>3b
    if((int)(a+b-1)/b*2>=(int)(a+c-1)/c*3){
        cout<<"YES\n";
    }else{
        cout<<"NO\n";
    }
    return 0;
}