using System;

public class Hello
{
    public static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var a = long.Parse(line[0]);
        var b = long.Parse(line[1]);
        var c = long.Parse(line[2]);
         getAns1(a, b, c);
    }
    public static void getAns1 (long a, long b, long c)
    {
        for (int i = -1000000; i <= 1000000; i++)
        {
            if (check(a, b, c, i)) { Console.WriteLine(i); }
        }
    }
    public  static  bool check (long a, long b, long c , long n)
    {
        var k1 = Math.Pow(n, 3);
        var k2 = a * Math.Pow(n, 2);
        var k3 = b * Math.Pow(n, 1);
        var k4 = (double)c;
        return Math.Abs(k1 + k2 + k3 + k4) < 0.4d;
    }
}