using System;
public class Program
{
public static void Main()
//tim so lon nhat
int n,i,max,temp;
Console.WriteLine("Nhap n so : ");
n = int.Parse(Console.ReadLine());
max = 0;
for( i = 1; i <= n ; i++ )
Console.WriteLine(" Nhap so n"+i+"=");
temp = int.Parse(Console.ReadLine());
if ( max < temp )
max = temp;
}
Console.WriteLine(max);