import std.algorithm, std.array, std.container, std.range, std.bitmanip;
import std.numeric, std.math, std.bigint, std.random, core.bitop;
import std.string, std.regex, std.conv, std.stdio, std.typecons;

void main()
{
  auto a = readln.chomp.to!int;
  auto b = readln.chomp.to!int;
  auto c = readln.chomp.to!int;

  auto bc = (a + b - 1) / b;
  auto cc = (a + c - 1) / c;

  writeln(bc * 2 >= cc * 3 ? "YES" : "NO");
}