using System.Collections.Generic;
public static void Main()
var count = allNumbers.Count;
for(var outer=0; outer<count-1; outer++)
var left = allNumbers[outer];
for(var inner=outer+1; inner<count; inner++)
var right = allNumbers[inner];
Console.WriteLine(right);
Console.WriteLine(left*right);
private static List<int> allNumbers = new List<int>