```cpp
#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";
    }
    else if(y==4||y==6||y==9||y==11)
    {
        cout<<"30";
    }
    else  if(n%4==0&&n%100!=0||n%400==0)
    {
        cout<<"29";
    }
    else cout<<"28";
    return 0;
}