//Rakshith Code Test - Groove Health - C#, .Net Core 3.1

using System; 

class GrooveHealth { 

    static void ClosePair(int []arr, int n, int x)                       //Print Function with 3 parameters

    {   

        int left = 0, right = 0;

        int l = 0, r = n-1, diff = int.MaxValue;                            // To store indexes of result pair // Initialize left and right indexes and   // difference between pair sum and x 

        while (r > l) 

        {

            if (Math.Abs(arr[l] + arr[r] - x) < diff)                       //check if the pair is closer than the one we have                 

            { 

                left = l; 

                right = r; 

                diff = Math.Abs(arr[l] + arr[r] - x); 

            }

             if (arr[l] + arr[r] > x)                                       // check if the pair has more sum then go to small values, else go to larger ones

                 r--; 

            else

                l++;

              } 

        Console.Write("The closest pair is " + 

                 arr[left] + " and " + arr[right]);                 

    } 

    public static void Main() 

    { 

        int []arr = {4,2,6,3,10};

        int x = 7;

        int y = 11;

        int z = 6;

        int n = arr.Length; 

        ClosePair(arr, n, x); 

        Console.WriteLine();

        ClosePair(arr, n, y);

        Console.WriteLine();

        ClosePair(arr, n, z);

    } 

}