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- #!/usr/bin/env python3
- import sys
- from collections import deque
- def scramble(password, instructions, unscramble=False):
- pw = deque(password)
- if unscramble:
- instructions = reversed(instructions)
- for words in instructions:
- if words[0] == 'swap':
- index = pw.index if words[1] == 'letter' else int
- i = index(words[2])
- j = index(words[5])
- pw[i], pw[j] = pw[j], pw[i]
- elif words[0] == 'rotate':
- if words[1] == 'based':
- i = pw.index(words[-1])
- if unscramble:
- oldi = i
- while (2 * oldi + 1 + (oldi >= 4)) % len(pw) != i:
- oldi = (oldi - 1) % len(pw)
- pw.rotate(-1)
- continue
- index = i + 1 + (i >= 4)
- elif words[1] == 'left':
- index = -int(words[2])
- else:
- index = int(words[2])
- pw.rotate(-index if unscramble else index)
- elif words[0] == 'reverse':
- start, end = map(int, words[2::2])
- while start < end:
- pw[start], pw[end] = pw[end], pw[start]
- start += 1
- end -= 1
- elif words[0] == 'move':
- src, dst = map(int, words[2::3])
- if unscramble:
- src, dst = dst, src
- letter = pw[src]
- del pw[src]
- pw.insert(dst, letter)
- return ''.join(pw)
- instructions = [line.split() for line in sys.stdin]
- print(scramble('abcdefgh', instructions))
- print(scramble('fbgdceah', instructions, True))
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