#include <iostream>
#include <algorithm>
#include <vector>
#include <deque>
#include <string>
#include <tuple>
#include <functional>
#include <numeric>
#include <cmath>
#include <iomanip>
#include <map>
#include <random>
//#include "toollib.h"
#define INT_MAX 2147483647
#define Loop(i, n) for(int i = 0; i < (int)n; i++)
#pragma warning (disable:4018)

using namespace std;
typedef long long int lint;

//***** Main Program *****

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