Created
June 5, 2019 16:41
-
-
Save izeigerman/513038c221989cfc48b8b501f8debbc1 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
class Solution: | |
def decodeString(self, s: str) -> str: | |
multipliers = [] | |
sequences = [] | |
last_multiplier = 0 | |
last_sequence = '' | |
for c in s: | |
if c.isdigit(): | |
last_multiplier = last_multiplier * 10 + int(c) | |
elif last_multiplier: | |
multipliers.append(last_multiplier) | |
last_multiplier = 0 | |
if c == '[': | |
sequences.append(last_sequence) | |
last_sequence = '' | |
elif c == ']': | |
prev_sequence = '' | |
if sequences: | |
prev_sequence = sequences.pop() | |
multiplier = multipliers.pop() | |
last_sequence = prev_sequence + multiplier * last_sequence | |
elif c.isalpha(): | |
last_sequence += c | |
return last_sequence | |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment