AdventOfCode/2015/day11.py

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data = 'cqjxjnds'
#import numpy as np
#base26m = np.array([26**n for n in range(7, -1, -1)], dtype=np.int64)
#def increment(s):
#digits = [ord(c)-97 for c in s]
#base26 = np.dot(base26m, digits)
#num = base26 + 1
#digits2 = []
#while num:
#digits2.append(num % 26)
#num //= 26
#digits2 += [0]*(8-len(digits2))
#return ''.join([chr(d+97) for d in reversed(digits2)])
def increment(s):
if 'a' <= s[-1] < 'z':
inc = 2 if s[-1] in 'hnk' else 1
return s[:-1] + chr(ord(s[-1])+inc)
else:
return increment(s[:-1]) + 'a'
def is_valid(s):
#if 'i' in s or 'o' in s or 'l' in s:
#return False
straight = False
for a, b, c in zip(s[:-2], s[1:-1], s[2:]):
if ord(a) == ord(b)-1 == ord(c)-2:
straight = True
break
if not straight:
return False
pairs = set()
for a, b in zip(s[:-1], s[1:]):
if a == b:
pairs.add(a)
if len(pairs) >= 2:
return True
return False
password = increment(data)
while not is_valid(password):
password = increment(password)
print(password) # Part 1 -- cqkkaabc is not correct?! - actually cqjxxyzz
password2 = increment(password)
while not is_valid(password2):
password2 = increment(password2)
print(password2) # Part 2