Library Fine

library_fine.cpp

// This source code written by Roland Ihasz 
#include <vector>
#include <iostream>

int rdn(int y, int m, int d)
{
	if (m < 3)
	{
		y--, m += 12;
	}
	int result = 365 * y + y / 4 - y / 100 + y / 400 + (153 * m - 457) / 5 + d - 306;
	return result;
}

int main()
{
	int actual_return_dd, actual_return_mm, actual_return_yyyy;
	int expected_dd, expected_mm, expected_yyyy;
	std::cin >> actual_return_dd >> actual_return_mm >> actual_return_yyyy;
	std::cin >> expected_dd >> expected_mm >> expected_yyyy;
	int days = rdn(actual_return_yyyy, actual_return_mm, actual_return_dd) - rdn(expected_yyyy, expected_mm,
		   expected_dd);
	if (actual_return_yyyy > expected_yyyy)
	{
		std::cout << 10000;
		return 0;
	}
	if (actual_return_yyyy == expected_yyyy && actual_return_mm > expected_mm )
	{
		std::cout << 500 * (actual_return_mm - expected_mm); // times number of late months
		return 0;
	}
	if (days <= 0)
	{
		std::cout << 0;
		return 0;
	}
	if (expected_mm == actual_return_mm && expected_yyyy == actual_return_yyyy)
	{
		std::cout << days * 15 << std::endl;
	}
	return 0;
}