using System;
public class Program
{
public static void Main()
A a =new A();
for(int i=0;i<5;i++)
a[i]= int.Parse(Console.ReadLine());
}
Console.WriteLine(a[i]);
class A
private int[] num = new int[5];
public int this [int index]{
get
return num[index];
set
if(value>=0)
num[index]=value;