#include <iostream>
#include <cstdint>
#include <set>

using namespace std;

int main()
{
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	
	uint32_t A, B, C;
	cin >> A >> B >> C;

	uint32_t cur;
	set<uint32_t> ans;
	if (C <= B)
	{
		cur = C;
		if (cur % A == 0)
			ans.insert(cur / A);
	}

	cur = C + B;
	if (cur % A == 0)
		ans.insert(cur / A);

	if (ans.empty()) cout << "-1\n";
	else for (const auto given : ans) cout << given << '\n';

	return 0;
}