#include <iostream>
using namespace std;
int main()
{
    int y,m;
    cin >> y >> m;
    if((y%4==0 && y%100!=0 && m==2) || (y%400==0 && m==2)) cout << "29";
    else if((m<8 && m%2==1) || (m>7 && m%2==0)) cout << "31";
    else if(m!=2) cout << "30";
    return 0;
}