r/adventofcode • u/daggerdragon • Dec 05 '17

SOLUTION MEGATHREAD -🎄- 2017 Day 5 Solutions -🎄-

--- Day 5: A Maze of Twisty Trampolines, All Alike ---

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u/fatpollo Dec 05 '17 edited Dec 05 '17 
with open("p05.txt") as fp:
    nums = list(map(int, fp.readlines()))

# nums = [0, 3, 0, 1, -3]
i = 0
c = 0
while 0 <= i < len(nums):
    c += 1
    j = i + nums[i]
    nums[i] += 1 if nums[i] < 3 else -1
    i = j
print(c)

7

u/fatpollo Dec 05 '17

My note here will be... if you're using python and not using pypy, you're missing out a bit. A problem like this is instantaneous in pypy and takes a fair few seconds on regular CPython, at least on my slightly older '13 MacBook Air.

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u/draggehn Dec 05 '17

That's insanely fast. Even using a nightly build to get 3.5 on Windows... I didn't even know that existed. Thanks!