#include<iostream>
using namespace std;
int days[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
int t;
int year,month,day,d;
bool check(int n)
{
if(n%4==0&&n%100!=0||n%400==0)
return true;
return false;
}
void get_month_2(int n)
{
if(check(year))
days[2]...