static void Merge(Element[] array, int p, int q, int r)
{
if (p + 1 >= r)
return;
int i = p;
int j = q;
var newarray = new Element[r - p];
int index = 0;
while (i < q && j < r)
{
int left = array[i].Key;
int right = array[j].Key;
if (left <= right)
{
newarray[index++] = array[i];
i++;
}
else
{
newarray[index++] = array[j];
j++;
}
}
if (i >= q)
while (j < r)
newarray[index++] = array[j++];
else
while (i < q)
newarray[index++] = array[i++];
index = 0;
for (i = p; i < r; i++)
array[i] = newarray[index++];
}
static void MergeSort(Element[] array, int p, int r)
{
if (p < r - 1)
{
int q = (p + r) / 2;
MergeSort(array, p, q);
MergeSort(array, q, r);
Merge(array, p, q, r);
}
}