Função recursiva de árvore
>>> def count_partitions(n, m):
"""Count the ways to partition n using parts up to m."""
if n == 0:
return 1
elif n < 0:
return 0
elif m == 0:
return 0
else:
return count_partitions(n-m, m) + count_partitions(n, m-1)
Bored Butterfly