#include <bits/stdc++.h> 
using namespace std;
int main(){
	int n,y,r;
	cin>>n>>y;
	if(n%4==0&&n%100!=0&&n%400==0){
		if(y==1||y==3||y==5||y==7||y==8||y==10||y==12){
			r=31;
		}if(y==4||y==6||y==9||y==11){
			r=30;
		}else{
			r=29;
		}
	}else{
		if(y==1||y==3||y==5||y==7||y==8||y==10||y==12){
			r=31;
		}if(y==4||y==6||y==9||y==11){
			r=30;
		}else{
			r=28;
		}
	}
	cout<<r;
}
/**************************************************************
	Problem: 2096
	User: sucongyi
	Language: C++
	Result: Wrong Answer
****************************************************************/