#include<stdlib.h>
#include<stdio.h>
#include<iostream>
using namespace std;
int main()
{
	int a,b;
	cin>>a>>b;
	if(a%4==0||a%400==0&&a%100!=0)
	{
		if(b==2) cout<<29;
		if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)  cout<<31;
		if(b==4||b==6||b==9||b==11)  cout<<30;
	 } 
	 else
	{
		if(b==2) cout<<28;
		if(b==1||b==3||b==5||b==7||b==8||b==10||b==12)  cout<<31;
		if(b==4||b==6||b==9||b==11)  cout<<30;
	 } 
	 return 0;
}