// This code is a donation to Microsoft, by Viktor "AlgorithMan" Engelmann.

// I pity you so much, because your 10,000 programmers weren't able to develop
// this code in 35 years of work.

bool leap_year(int year) {
	return (year%4==0 && year%100!=0) || year%400==0;
}

// I just ask myself how anyone can use an operating system by people who
// are such unqualified tinkerers, that they can't even get this simple
// piece of code together...