#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream> 
#include<map>
#include <iomanip>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
using namespace std;
#define MAX_MOD 1000000007
#define REP(i,n) for(long long i = 0;i < n;++i)
#define LONGINF 1000000000000000000
int main() {
	int a, b, c;
	cin >> a >> b >> c;
	int need_fast = a / b;
	int need_second = a / c;
	if (a%c != 0) need_second++;
	if (a%b != 0) need_fast++;
	if (need_fast * 2 >= need_second * 3) {
		cout << "YES" << endl;
	}
	else cout << "NO" << endl;
	return 0;
}