#include <bits/stdc++.h>
#define rep(i, a) for (int i = 0; i < (a); i++)
#define rep2(i, a, b) for (int i = (a); i < (b); i++)
#define repr(i, a) for (int i = (a) - 1; i >= 0; i--)
#define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--)
using namespace std;
typedef long long ll;
const ll inf = 1e9;
const ll mod = 1e9 + 7;

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

    int x = (a + b - 1) / b;
    int y = (a + c - 1) / c;

    if (y * 3 <= x * 2) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }
}