import itertools
import operator


yoba = lambda s: sum(itertools.starmap(operator.gt, itertools.combinations(s, 2)))

seqs = (
	(1, 2, 5, 3, 4, 7, 6),
	(4, 3, 2, 1),
	tuple(reversed(range(10))),
	(0, 1, 2, 3, 4),
	(4, 3, 2, 1, 0, 1),
)
for seq in seqs:
	
	print(yoba(seq))