using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        var input = Console.ReadLine().Split().Select(int.Parse).ToArray();
        float A = input[0];
        float B = input[1];
        float C = input[2];

        var list = new List<float>();

        var N1 = (B + C) / A;
        if (N1-(int)N1 == 0 && N1 > B / A) list.Add(N1);

        var N2 = C / A;
        if (N2 - (int)N2 == 0 && N2 <= B / A) list.Add(N2);

        list = list.Distinct().OrderBy(x => x).ToList();
        if (list.Count == 0) Console.WriteLine(-1);
        else list.ForEach(Console.WriteLine);
    }
}