tj

#include<bits/stdc++.h>
using namespace std;

int main()
{
    int a,b;
    cin>>a>>b;
    int c[12] = {31,28,31,30,31,30,31,31,30,31,30,31};
    if(b!=2)
        cout<<c[b-1];
    else
        if((a%100==0&&a%400==0)||(a%4==0&&a%100!=0))
            cout<<29;
        else
            cout<<28;
}