public static void Main()
int[] input1 = {4,3,21,6,7};
Answer2(input1, target1);
int[] input2 = {1,7,2,3,4,5,6};
Answer2(input2, target2);
int[] input3 = {1,2,3,4,5,6};
Answer2(input3, target3);
private static void Answer2(int[] input, int target)
string output = string.Empty;
Console.WriteLine("Output - " + output);