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77 lines
1.9 KiB
Markdown
77 lines
1.9 KiB
Markdown
---
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id: 69a890af247de743333bd4d0
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title: "Challenge 227: Cooldown Time"
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challengeType: 29
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dashedName: challenge-227
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---
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# --description--
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Given two timestamps, the first representing when a user finished an exam, and the second representing the current time, determine whether the user can take an exam again.
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- Both timestamps will be given the format: `"YYYY-MM-DDTHH:MM:SS"`, for example `"2026-03-25T14:00:00"`. Note that the time is 24-hour clock.
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- A user must wait at least 48 hours before retaking an exam.
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# --hints--
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`can_retake("2026-03-23T08:00:00", "2026-03-25T14:00:00")` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(can_retake("2026-03-23T08:00:00", "2026-03-25T14:00:00"), True)`)
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}})
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```
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`can_retake("2026-03-24T14:00:00", "2026-03-25T10:00:00")` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(can_retake("2026-03-24T14:00:00", "2026-03-25T10:00:00"), False)`)
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}})
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```
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`can_retake("2026-03-23T09:25:00", "2026-03-25T09:25:00")` should return `True`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(can_retake("2026-03-23T09:25:00", "2026-03-25T09:25:00"), True)`)
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}})
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```
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`can_retake("2026-03-25T11:50:00", "2026-03-23T11:49:59")` should return `False`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertIs(can_retake("2026-03-25T11:50:00", "2026-03-23T11:49:59"), False)`)
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}})
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```
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# --seed--
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## --seed-contents--
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```py
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def can_retake(finish_time, current_time):
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return finish_time
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```
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# --solutions--
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```py
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from datetime import datetime, timedelta
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def can_retake(finish_time, current_time):
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fmt = "%Y-%m-%dT%H:%M:%S"
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finished_dt = datetime.strptime(finish_time, fmt)
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current_dt = datetime.strptime(current_time, fmt)
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diff = current_dt - finished_dt
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cooldown = timedelta(hours=48)
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return diff >= cooldown
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```
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