#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;


bool f[10008];
bool F[10008];

int main() {

	
	int n,a,b;
	cin>>n>>a>>b;
	int x=n/a;
	if(n%a)x++;
	int y=n/b;
	if(n%b)y++;
	if((x*2)/3>=y)cout<<"YES"<<endl;
	else cout<<"NO"<<endl;

	return 0;
}