def test7():
data = [1, 2, 1, 2, 1]
assert count_inverse_pairs(data) == 3
data = [1, 2, 1, 2, 1]
assert count_inverse_pairs2(data) == 3
def test8():
assert count_inverse_pairs([]) == 0
assert count_inverse_pairs2([]) == 0
def test6():
data = [2, 1]
assert count_inverse_pairs(data) == 1
data = [2, 1]
assert count_inverse_pairs2(data) == 1
def test5():
data = [1, 2]
assert count_inverse_pairs(data) == 0
data = [1, 2]
assert count_inverse_pairs2(data) == 0
def test1():
data = [1, 2, 3, 4, 7, 6, 5]
assert count_inverse_pairs(data) == 3
data = [1, 2, 3, 4, 7, 6, 5]
assert count_inverse_pairs2(data) == 3
def test3():
data = [1, 2, 3, 4, 5, 6]
assert count_inverse_pairs(data) == 0
data = [1, 2, 3, 4, 5, 6]
assert count_inverse_pairs2(data) == 0
def test2():
data = [6, 5, 4, 3, 2, 1]
assert count_inverse_pairs(data) == 15
data = [6, 5, 4, 3, 2, 1]
assert count_inverse_pairs2(data) == 15