java某年某月的天数

Problem Description

Input

Output

Example Input

2009\1

Example Output

31

import java.util.Scanner;
public class Main
{
 public static void main(String[] args)
 {
  Scanner in=new Scanner(System.in);
     String s=in.nextLine();
     String a[]=s.split("\\\\");
     int year=Integer.parseInt(a[0]);
     int month=Integer.parseInt(a[1]);
     int flag=1;
     if(year%4==0&&year%100!=0||year%400==0)
  {flag=0;}
     if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
  {System.out.println("31");}
     else if(month==4||month==6||month==9||month==11)
  {System.out.println("30");}
     else if(month==2)
     {
      if(flag==1)
   {System.out.println("28");}
      else
   {System.out.println("29");}
     }
 }
}