using System;

public class Program

{

    public static void Main()

    {

        int[] arr = new int[] {1,2,3,4,5};

        var res = ProductOfArray(arr);

        foreach(var x in res)

        {

            Console.Write(x + "    ");

        }

    }

    private static int[] ProductOfArray(int[] input)

    {

        var output = new int[input.Length];

        int left = 1;

        for(int i=0; i< input.Length; i++)

        {

            output[i] = left;

            left *= input[i];

        }

        int right = 1;

        for(int i=input.Length-1; i>=0; i--)

        {

            output[i] *= right;

            right *= input[i];

        }

        return output;

    }

}