#include<bits/stdc++.h> using namespace std; int main() { int a,b; cin>>a>>b; if(a%40&&a%100>0||a%4000) { if(b1) { cout<<"31"; } if(b2) { cout<<"29"; }

	if(b==3)
    {
        cout<<"31"; 
    }

	if(b==4)
    {
        cout<<"30";
    }
	if(b==5)
    {
        cout<<"31";	
    }
	if(b==6)
    {
        cout<<"30";
    }
	if(b==7)
    {
        cout<<"31";
    }
	if(b==8)
    {
        cout<<"31";
    }
	if(b==9)
    {
        cout<<"30";
	}
	if(b==10)
	{
    	cout<<"31";
	}
	if(b==11)
	{
    	cout<<"30";
	}
	if(b==12)
    {
		cout<<"31";
	}
}
else
{
if(b==1)
	{
 		cout<<"31";    
	} 
	if(b==2)
	{
    	cout<<"28";
	}
	if(b==3)
	{
    	cout<<"31";
	}
	if(b==4)
	{
    	cout<<"30";
	}
	if(b==5)
	{
    	cout<<"31";
	}
	if(b==6)
	{
    	cout<<"30";
	}
	if(b==7)
	{
    	cout<<"31";
	}
	if(b==8)
	{
    	cout<<"31";
	}
	if(b==9)
	{
    	cout<<"30";
	}
	if(b==10)
	{
    	cout<<"31";
	}
	if(b==11)
	{
    	cout<<"30";
	}
	if(b==12)
	{
    	cout<<"31";
	}
}
return 0;

}