#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

void in(){} template<typename Head,typename... Tail> void in(Head&& head,Tail&&... tail){cin>>head;in(forward<Tail>(tail)...);}
void out(){cout<<endl;} template<typename Head,typename... Tail> void out(Head&& head,Tail&&... tail){cout<<head<<" ";out(forward<Tail>(tail)...);}
void flagfunc4(bool flag){cout<<(flag?"NO\n":"YES\n");}

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  ll a,b,c;
  in(a,b,c);
  flagfunc4(( a + b - 1 ) / b * 2 / 3 < ( a + c - 1 ) / c);
}