#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";
	if(y==4||y==6||y==9||y==11) cout<<"30";
	if(y==2){
	if((n%400==0)||(n%100!=0&&n%4==0)) cout<<"29";
	else cout<<"28";}
	return 0;
	}

/**************************************************************
	Problem: 2096
	User: ljl2
	Language: C++
	Result: Accepted
	Time:16 ms
	Memory:2072 kb
****************************************************************/