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