task.cpp

// MCCME issue 3299
#include <iostream>
#include <tuple>

auto gcd (int a, int b) -> std::tuple<int, int, int> // <GCD, x, y>
{
    if (a == 0)
    {
        return std::make_tuple (b, 0, 1);
    }
    else
    {
        const auto rs = gcd (b % a, a);

        const int d = std::get<0> (rs);
        const int x1 = std::get<1> (rs);
        const int y1 = std::get<2> (rs);

        const int x = y1 - int (b / a) * x1;
        const int y = x1;
        return std::make_tuple (d, x, y);
    }
}

auto main () -> int
{
    int a, b, c;
    std::cin >> a >> b >> c;
    
    if (a == 0 && b == 0 && c != 0)
    {
        std::cout << "Impossible" << std::endl;
        return 0;
    }

    const auto rs = gcd (a, b);

    if (c % std::get<0> (rs) != 0)
    {
        std::cout << "Impossible" << std::endl;
    }
    else
    {
        std::cout << std::get<0> (rs) << " "
                  << std::get<1> (rs) << " "
                  << std::get<2> (rs) <<
                  std::endl;
    }

    return 0;
}