#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
#include <stack>
#include <algorithm>
#include <string>
#include <map>
#include <iterator>
#include <set>
#include <queue>
#include <bitset>
#include <cassert>

using namespace std;

int main() {

    int a, b, c;
    cin >> a >> b >> c;

    int ba = (a + b - 1) / b;
    int ca = (a + c - 1) / c;

    if (2 * ba >= 3 * ca) {
        cout << "YES" << endl;
    } else {
        cout << "NO" << endl;
    }

}