#include<bits/stdc++.h>
using namespace std;
int main() {
    int n,y;
    cin>>n>>y;
    if(y==1||y==3||y==5||y==7||y==8||y==10||y==12){
        cout<<31<<endl;
    }else if(y==4||y==6||y==9||y==11){
        cout<<30<<endl;
    }else if(y==2){
        if(n%4==0&&n%100!=0){
            cout<<29<<endl;
        }else if(n%400==0){
            cout<<29<<endl;
        }else{
            cout<<28<<endl;
        }
    }
    return 0;
}
/**************************************************************
	Problem: 1825
	User: wangyiyang
	Language: C
	Result: Compile Error
****************************************************************/