using System; 

class Program 
{ 
  static void Main(string[] args) 
  { 
    int[] numbers = new int[3]; 
    numbers[0] = 1; 
    numbers[1] = 99; 
    numbers[2] = 1000; 

    for (int i = 0; i < numbers.Length; i += 2) 
    { 
      Console.Out.WriteLine(i); 
    } 
  } 
}