#include<bits/stdc++.h>
using namespace std;
int isleap(int a)
{
    if((a%4==0||a%100!=0)||a%400==0)
    {
        return 1;
    }
    else
    {
        return 0;
    }
}
int main()
{
    int ans[13]={0,31,28,31,30,31,30,31,31,30,31,30,31},a,b;
    cin>>a>>b;
    if(isleap(a))
    {
        ans[2]=29;
    }
    cout<<ans[b];
    return 0;
}

样例是对的，80分，为啥WA，请大佬指导