#include<bits/stdc++.h>
using namespace std;
int main() {
	int n,y;
	cin>>n>>y;
	if(y==1||y==3||y==5||y==7||y==8||y==10||y==12){
		cout<<31<<endl;
	}else if(y==4||y==6||y==9||y==11){
		cout<<30<<endl;
	}else if(y==2){
		if(n%4==0&&n%100!=0){
			cout<<29<<endl;
		}else if(n%400==0){
			cout<<29<<endl;
		}else{
			cout<<28<<endl;
		}
	}
	return 0;
}
/**************************************************************
	Problem: 1825
	User: admin
	Language: C++
	Result: Accepted
	Time:21 ms
	Memory:2072 kb
****************************************************************/