intercal/adventofcode-2021
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Add assert to rangesum JUUUUUUUST in case

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Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
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Alek Ratzloff
2021-12-07 11:47:27 -08:00
parent f4351ce9a7
commit eaf69cabeb
1 changed files with 1 additions and 0 deletions
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day07/day07.py
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@@ -4,6 +4,7 @@ from typing import Sequence
def rangesum(rn: range): def rangesum(rn: range):
assert rn.step == 1, "this function doesn't work when range step != 1"
return (((rn.stop + 1) * rn.stop) // 2) - (((rn.start + 1) * rn.start) // 2) return (((rn.stop + 1) * rn.stop) // 2) - (((rn.start + 1) * rn.start) // 2)