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