public static void Main()
int n = int.Parse(Console.ReadLine());
for(int i=1; i<=(n+1)/2; i++)
Console.Write(new string('_',n/2-i));
Console.Write(new string('*',2*i));
Console.WriteLine(new string('_',n/2-i));
Console.Write(new string('_',n/2-(i-1)));
Console.Write(new string('*',i+i-1));
Console.WriteLine(new string('_',n/2-(i-1)));
for(int i=1; i<=n/2; i++)
Console.Write(new string('|',1));