public class NumberOfDaysPerMonth {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        java.util.Scanner input = new java.util.Scanner(System.in);

        System.out.print("Enter the number of year :");
        int year = input.nextInt();
        System.out
 
.print("Enter the number of month :");
        int month = input.nextInt();


        if( ( year % 4 == 0 && year % 100 !=0 || year % 400 == 0)   && month == 2)
        {    //判定 是否是閏年，是否是閏年2月 
             //&& 的運算優先順序比 || 高 並且java中所有二元操作符都是左結合的
            System.out.println(" February "
 
 + year +" has 29 days");
        }
        else
        {
            switch(month) {
            case 1: System.out.println(" January " + year +" has 31 days");break;
            case 2: System.out.println(" February " + year +" has 28 days");break;
            case 3: System.out.println(" March "
 
 + year +" has 31 days");break;
            case 4: System.out.println(" April " + year +" has 30 days ");break;
            case 5: System.out.println(" May " + year +" has 31 days ");break;
            case 6: System.out.println(" June " + year +" has 30 days ");break;
            case 7: System.out.println(" July " + year +" has 31 days ");break;
            case 8: System.out.println(" August " + year +" has 31 days ");break;
            case 9: System.out.println(" September " + year +" has 30 days ");break;
            case 10: System.out.println(" October " + year +" has 31 days ");break;
            case 11: System.out.println(" November " + year +" has 30 days ");break;
            case 12: System.out.println(" December " + year +" has 31 days ");break;
            }
        }



    }

}