def heapsort_test_2():
    print(heapsort([0]))
def heapsort_test_1():
    print(heapsort([]))
def heapsort_test_6():
    print(heapsort([9, 7, 5, 3]))
def heapsort_test_5():
    print(heapsort([3, 5, 7, 9]))
def heapsort_test_4():
    print(heapsort([4, 2, 8, 3, 6, 1, 6, 3, 6, 30, 20, 10, -5, 7, 3]))
def heapsort_test_3():
    print(heapsort([3, 2]))