#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std;

int main() {
    int32_t a, b, c;
    cin >> a >> b >> c;
    auto nb = (a + b - 1) / b, nc = (a + c - 1) / c;
    cout << (3 * nc <= 2 * nb ? "YES" : "NO") << endl;
    return 0;
}