#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

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

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

  if (2 * x >= 3 * y)
    cout << "YES" << endl;
  else
    cout << "NO" << endl;
  
  return 0;
}