include<bits/stdc++.h>

using namespace std; int main(){

int A,B; cin>>A>>B; if(A%4==0&&(A%100!=0||A%400==0)) {

if(B==1||B==3||B==5||B==7||B==8||B==10||B==12)
{
    cout<<"31";
}
else if(B==4||B==6||B==9||B==11)
{
    cout<<"30";
}
else
{
    cout<<"29";
}

} else {

if(B==1||B==3||B==5||B==7||B==8||B==10||B==12)
{
    cout<<"31";
}
else if(B==4||B==6||B==9||B==11)
{
    cout<<"30";
}
else
{
    cout<<"28";
}

} return 0; }