#include <iostream>

using namespace std;

int main() {

    std::ios::sync_with_stdio(false);
    std::cin.tie(0);

    int a, b, c;
    cin >> a >> b >> c;
    (((a % b == 0 ? a / b : a / b + 1) * 2 / 3) >= (a % c == 0 ? a / c : a / c + 1)) ?
        (cout << "YES" << endl) :
        (cout << "NO" << endl);
    return 0;
}