mirror of
https://github.com/osmarks/random-stuff
synced 2024-11-17 01:14:48 +00:00
25 lines
529 B
Python
25 lines
529 B
Python
import math, itertools
|
|
|
|
count = 0
|
|
for permutation in itertools.permutations(range(7)):
|
|
perm = [
|
|
list(range(7)),
|
|
list(permutation)
|
|
]
|
|
perm = dict(zip(*perm))
|
|
vals = set(perm)
|
|
|
|
print(perm)
|
|
cycs = []
|
|
while vals:
|
|
nxt = vals.pop()
|
|
seen = []
|
|
while nxt not in seen:
|
|
lnxt = nxt
|
|
nxt = perm[nxt]
|
|
seen.append(lnxt)
|
|
cycs.append(seen)
|
|
vals -= set(seen)
|
|
if math.lcm(*map(len, cycs)) == 4:
|
|
count += 1
|
|
print(count) |