#nullable enable

using System.Numerics;

#region
var (_input, _iter) = (Array.Empty<string>(), 0);
T I<T>() where T : IParsable<T>
{
    while (_iter >= _input.Length) (_input, _iter) = (Console.ReadLine()!.Trim().Split(' '), 0);
    return T.Parse(_input[_iter++], null);
}
#endregion

const int MaxB = 1000000000;

var n = I<BigInteger>();
var m = I<BigInteger>();
var l = I<int>();

Console.WriteLine($"? {MaxB} 1");
var b0 = I<int>();
Console.WriteLine($"? {MaxB - b0 - 1} 1");
var b = I<int>() + 1;

if (b == 1)
{
    Console.WriteLine("! 0");
    return;
}

var ml = BigInteger.Pow(m, l);
var ans = BigInteger.ModPow(n, ml, b);
Console.WriteLine($"! {ans}");