static void dupe()
{
Int64 div3 = (1000 + 3 - 1) / 3; //VERY IMPORTANT. HOW TO ROUND UP
Int64 div5 = (1000 + 5 - 1) / 5;
Int64[] arr1 = new Int64[div3];
Int64[] arr2 = new Int64[div5];
Int64[] arr3 = new Int64[Math.Abs(arr1.Length + arr2.Length) / 2];
fillarr3(arr1);
fillarr5(arr2);
//int[] a3 = new int[arr1.Length + arr2.Length];
//arr1.CopyTo(a3, 0);
//arr2.CopyTo(a3, arr1.Length);
//var result = arr1.Union(arr2).ToArray();
//result = arr1.Concat(arr2).OrderBy(v =>Math.Abs(v)).ToArray();
var result = arr1.Concat(arr2).Distinct().OrderBy(v => Math.Abs(v)).ToArray();
Int64 sum = result.Sum();
Console.WriteLine(sum);
foreach (int i in result)
{
Console.WriteLine(i);
}
Console.WriteLine(sum - 1);
}