using static System.Math;
using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = Abs(int.Parse(line[0]));
        var k = int.Parse(line[1]);
        var t = int.Parse(line[2]);
        var a = (n + k - 1) / k;
        Console.WriteLine(a <= t ? "Yes" : "No");
    }
}