#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,y,yt;
	cin>>n>>y;
	if(y==2){
		if(n%100==0||n%4==0&&n%100!=0){
			yt=29;
		}else{
			yt=28;
		}
	}else if(y==1||y==3||y==5||y==7||y==8||y==10||y==12){
		yt=31;
	}else{
		yt=30;
	}
	cout<<yt;
	return 0;	
}
/**************************************************************
	Problem: 2096
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:14 ms
	Memory:2072 kb
****************************************************************/