#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;
    }
    else if(b==2){
        if(a%400==0){
                cout<<29;
            }
        else if(a%4==0&&a%100!=0){
                cout<<29;
        }
        else if(a%100==0) cout<<28;
        else cout<<28;
    }
    return 0;
}