#include<iostream>

using namespace std;
int main()
{
    int M,G,i;

    cin>>M>>G;
    if(M=='1'||M=='3'||M=='5'||M=='7'||M=='8'||M=='10'||M=='12'){cout<<"31";}
    else if(M=='4'||M=='6'||M=='9'||M=='11'){cout<<"30";}


}