func medianOrdered[E cmp.Ordered](data []E, a, b, c int, swaps *int) int {
	a, b = order2Ordered(data, a, b, swaps)
	b, c = order2Ordered(data, b, c, swaps)
	a, b = order2Ordered(data, a, b, swaps)
	return b
}

// medianAdjacentOrdered finds the median of data[a - 1], data[a], data[a + 1] and stores the index into a.