#include <bits/stdc++.h>

inline long nextInt(void) {
  long temp;
  std::cin >> temp;
  return temp;
}

int main() {

  int a, b, c;
  int x1, x2;

  std::cin >> a >> b >> c;

  x1 = (a+b-1) / b;
  x2 = (a+c-1) / c;

  if( x1 * 2 >= x2 * 3 ) {
    std::cout << "YES" << std::endl;
  }
  else {
    std::cout << "NO" << std::endl;
  }
  

  return 0;
}