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94 lines
2.7 KiB
Markdown
94 lines
2.7 KiB
Markdown
---
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id: 69f35a5bb823ed620fcb7cbe
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title: "Challenge 285: Meeting Time"
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challengeType: 29
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dashedName: challenge-285
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---
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# --description--
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Given a 3D array representing availability windows for multiple people, return the earliest time where everyone has one hour free. If no such time exists, return `"None"`.
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- Each person's availability is an array of `[start, end]` integer pairs in 24-hour time. For example, `[10, 12]` would mean the person is available from 10 to 12. Start times range from 0-23, and end times range from 1-24.
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For example, given:
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```json
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[
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[[10, 12], [15, 16]], // person 1
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[[11, 14], [15, 16]] // person 2
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]
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```
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Return `11`, the start of their first shared free hour.
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# --hints--
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`get_meeting_time([[[10, 12], [15, 16]], [[11, 14], [15, 16]]])` should return `11`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_meeting_time([[[10, 12], [15, 16]], [[11, 14], [15, 16]]]), 11)`)
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}})
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```
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`get_meeting_time([[[9, 10], [12, 15]], [[10, 11], [13, 14]], [[9, 11], [10, 14]]])` should return `13`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_meeting_time([[[9, 10], [12, 15]], [[10, 11], [13, 14]], [[9, 11], [10, 14]]]), 13)`)
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}})
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```
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`get_meeting_time([[[7, 8], [9, 11], [12, 14], [15, 16]], [[8, 11], [12, 13], [14, 15]]])` should return `9`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_meeting_time([[[7, 8], [9, 11], [12, 14], [15, 16]], [[8, 11], [12, 13], [14, 15]]]), 9)`)
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}})
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```
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`get_meeting_time([[[7, 8], [10, 12], [13, 15]], [[8, 11], [12, 13], [14, 15]], [[6, 7], [8, 9], [12, 13]]])` should return `None`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_meeting_time([[[7, 8], [10, 12], [13, 15]], [[8, 11], [12, 13], [14, 15]], [[6, 7], [8, 9], [12, 13]]]), "None")`)
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}})
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```
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`get_meeting_time([[[1, 3], [4, 6], [8, 10], [20, 23]], [[15, 16], [17, 18], [19, 22], [23, 24]], [[14, 16], [17, 23]], [[2, 4], [5, 6], [18, 19], [21, 22], [23, 24]]])` should return `21`.
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```js
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({test: () => { runPython(`
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from unittest import TestCase
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TestCase().assertEqual(get_meeting_time([[[1, 3], [4, 6], [8, 10], [20, 23]], [[15, 16], [17, 18], [19, 22], [23, 24]], [[14, 16], [17, 23]], [[2, 4], [5, 6], [18, 19], [21, 22], [23, 24]]]), 21)`)
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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 get_meeting_time(availability):
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return availability
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```
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# --solutions--
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```py
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def get_meeting_time(availability):
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for hour in range(24):
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if all(
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any(start <= hour and hour + 1 <= end for start, end in person)
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for person in availability
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):
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return hour
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return "None"
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```
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