#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>
#include <set>
using namespace std;

int main(){
	long long a,b,c;
	cin >> a >> b >> c;

	long long x = a/b + (a%b?1:0);
	long long y = a/c + (a%c?1:0);
	cerr << x << " " << y << endl;
	if(x*2 >= y*3) cout << "YES" << endl;
	else cout << "NO" << endl;
	return 0;
}