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