https://old.ynoip.cn/p/1117

#include <cstdio>
using namespace std;

int main(void) {
	int n = 0;
	scanf("%d", &n);
	if (n % 400 == 0 || (n % 100 != 0 && n % 4 == 0))
		printf("yes");
	else
		printf("no");
	return 0;
}