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