#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

ll a, b, c, x, y;

int main() {
  cin >> a >> b >> c;
  x = (a + b - 1) / b;
  y = (a + c - 1) / c;
  if (2 * x >= 3 * y) {
    cout << "YES" << endl;
  } else cout << "NO" << endl;
  return 0;
}