#include <fstream>
#include <iostream>
#include <string>
#include <vector>

int find2(std::vector<int> &numbers)
{
	for(auto i = 0; i < numbers.size(); ++i)
		for(auto j = i + 1; j < numbers.size(); ++j)
			if(numbers[i] + numbers[j] == 2020)
				return numbers[i] * numbers[j];

	return 0;
}
int find3(std::vector<int> &numbers)
{
	for(auto i = 0; i < numbers.size(); ++i)
		for(auto j = i + 1; j < numbers.size(); ++j)
			for(auto k = i + 1; k < numbers.size(); ++k)
				if(numbers[i] + numbers[j] + numbers[k] == 2020)
					return numbers[i] * numbers[j] * numbers[k];

	return 0;
}

int main()
{
	std::ifstream ifs("data");
	if(!ifs.is_open())
	{
		std::cerr << "Couldn't open file." << std::endl;
		return -1;
	}

	std::vector<int> numbers;
	for(std::string line; std::getline(ifs, line); )
		numbers.push_back(std::atoi(line.c_str()));

	std::cout << find2(numbers) << std::endl;
	std::cout << find3(numbers) << std::endl;

	return 0;
}