#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"<<endl;
	}
	else if(B==4||B==6||B==9||B==11){
		cout<<"30"<<endl;
	}
	else{
		if(((B==2)&&(A%4==0&&A&&100!=0))||(A%400==0)){
			cout<<"29"<<endl;
		}
		else{
			cout<<"28"<<endl;
		}
	}
	return 0;
}