import java.util.Scanner;
public class Main{

public static void main (String[] args){
	Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		if(b ==1 || b == 3 || b == 5 || b == 7 || b ==8 || b ==10 || b ==12) {
			System.out.println(31);
		}
		if(b==4 ||b==6||b== 9||b == 11) {
			System.out.println(30);
		}
		if(b == 2) {
				if(a % 4 == 0 && a % 100 != 0 || a % 400 == 0) {
				System.out.println(29);
			} else{
				System.out.println(28);
			}
		
		}
		}
		
}
/**************************************************************
	Problem: 1825
	User: admin
	Language: Java
	Result: Accepted
	Time:1862 ms
	Memory:39904 kb
****************************************************************/