#include <bits/stdc++.h>
using namespace std;
int main(){
	int n,y;
	cin>>n>>y;
	if(n%4==0&&n%100!=0||n%400){
		if(y=2){
			cout<<"28";
		}else{
			cout<<"29";
		}
		
	}
	else if(y=4,6,9,11){
		cout<<"30";
	}else{
		cout<<"31";
	}
}
/**************************************************************
	Problem: 2096
	User: cici
	Language: C++
	Result: Wrong Answer
****************************************************************/