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