Anders Englöf Ytterström
5deb351504
DDOS of adventofcode.com, did not get to open the puzzle until 06:05 (five minutes local time). Screwed up the zip() and lost valuable minutes by trying to replace it with itertools, only to find I have made a typo (did AB CD EF instead of AB BC CD). I also lost valuable minutes by tring to solve p1 with one nested loop. Stupid. For part 2, I created the issafe() helper to be able to remove items from reports and test, one at the time.
34 lines
669 B
Python
34 lines
669 B
Python
from output import ints
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def solve(data):
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reports = [ints(line) for line in data.splitlines()]
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p1 = 0
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p2 = 0
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for report in reports:
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if issafe(report):
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p1 += 1
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for i in range(len(report)):
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if issafe(report[:i] + report[i + 1 :]):
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p2 += 1
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break
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return p1, p2
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def issafe(report):
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diffs = [a - b for a, b in zip(report, report[1:])]
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return all(-3 <= d <= -1 for d in diffs) or all(1 <= d <= 3 for d in diffs)
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if __name__ == "__main__":
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with open("./input/02.txt", "r") as f:
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inp = f.read().strip()
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p1, p2 = solve(inp)
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print(p1)
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print(p2)
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