/// <summary>
/// Complexity: N^2
/// No extra space, not stable
/// </summary>
/// <param name="arr"></param>
public static void SelectionSort(IComparable[] arr)
{
var N = arr.Count();
for (var i = 0; i < N - 1; i++)
{
var min = i;
for (var j = i + 1; j < N; j++)
{
if (Less(arr[j], arr[min]))
{
min = j;
}
}
Swap(arr, i, min);
}
}
/// <summary>
/// Complexity: N^2
/// No extra space, stable
/// </summary>
/// <param name="arr"></param>
public static void InsertionSort(IComparable[] arr)
{
var N = arr.Count();
for (var i = 1; i < N; i++)
{
var j = 0;
var key = arr[i];
while (j < i && LessOrEqual(arr[j], arr[i]))
{
j++;
}
for(var k = i; k > j; k--)
{
arr[k] = arr[k - 1];
}
arr[j] = key;
}
}
public static void BubbleSort(IComparable[] arr)
{
var N = arr.Count();
for (var i = 0; i < N - 1; i++)
{
var flag = false;
for (var j = N - 1; j > i; j--)
{
if (Less(arr[j], arr[j - 1]))
{
Swap(arr, j, j - 1);
flag = true;
}
}
if (flag == false)
{
return;
}
}
}
