#include<bits/stdc++.h>
using namespace std;
int main()
{
    long long year;int month;int days;
    cin>>year>>month;
    bool reas1,reas2;
    reas1=year%4==0&&year%100!=0;
    reas2=year%400==0;
    if(month==2)
    {
        if(reas1==1||reas2==1)
            days=29;
        else
            days=28;
    }
    else if(month==1||month==3||month==5||month==7||
            month==8||month==10||month==12)
            days=31;
    else
            days=30;
    cout<<days;
}