#include <bits/stdc++.h>
using namespace std;
int main()
{
	int a, b;
	cin>>a>>b;
	switch(b)
	{
		case 1:
			cout<<31; 
			break;
		case 2:
			if((a%400 == 0) || (a%4 == 0 && a%100 !=0))
			{
				cout<<29;
			}
			else
			{
				cout<<28;
			}
			break;
		case 3:
			cout<<31; 
			break;
		case 4:
			cout<<30; 
			break;
		case 5:
			cout<<31; 
			break;
		case 6:
			cout<<30; 
			break;
		case 7:
			cout<<31; 
			break;
		case 8:
			cout<<31; 
			break;
		case 9:
			cout<<3; 
			break;
		case 10:
			cout<<31; 
			break;
		case 11:
			cout<<30; 
			break;
		case 12:
			cout<<31; 
			break;
		default:
			cout<<"输入错误"; 
	}
}