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