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