#include<bits/stdc++.h>
using namespace std;
int y,b,m,ans;
int main()
{
	cin>>y>>m;
	if(m==1||m==3||m==5||m==7||m==8||m==10||m==12)ans=31;
	if(m==4||m==6||m==9||m==11)ans=30;
	if(m==2)
	{
		if((y%4==0&&y%100!=0)||y%400==0)b=1;
		else b=0;
		if(b=1)ans=29;
		else ans=28;
	}
	cout<<ans;
	return 0;
}