#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b;
	cin>>a>>b;
	if(b==1||b==3||b==5||b==7||b==8||b==10||b==12) cout<<31;
	else if(b==4||b==6||b==9||b==11) cout<<30;
	if(a%4==0&&a%100!=0||a%400==0){
		if(b==2){
			cout<<29;
		}
	}else{
		if(b==2){
			cout<<28;
		}
	}
}
/**************************************************************
	Problem: 2096
	User: linzihang
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/