#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;
    else if(b==4||b==6||b==9||b==11) cout<<30;
    if(a%4==0&&a%100!=0||a%400==0){
        if(b==2){
            cout<<29;
        }
    }else{
        if(b==2){
            cout<<28;
        }
    }
}
/**************************************************************
	Problem: 2096
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2072 kb
****************************************************************/