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Tom
81 lines
2.3 KiB
Markdown
81 lines
2.3 KiB
Markdown
---
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id: 69f35a5bb823ed620fcb7cbe
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title: "Challenge 285: Meeting Time"
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challengeType: 28
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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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`getMeetingTime([[[10, 12], [15, 16]], [[11, 14], [15, 16]]])` should return `11`.
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```js
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assert.equal(getMeetingTime([[[10, 12], [15, 16]], [[11, 14], [15, 16]]]), 11);
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```
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`getMeetingTime([[[9, 10], [12, 15]], [[10, 11], [13, 14]], [[9, 11], [10, 14]]])` should return `13`.
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```js
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assert.equal(getMeetingTime([[[9, 10], [12, 15]], [[10, 11], [13, 14]], [[9, 11], [10, 14]]]), 13);
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```
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`getMeetingTime([[[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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assert.equal(getMeetingTime([[[7, 8], [9, 11], [12, 14], [15, 16]], [[8, 11], [12, 13], [14, 15]]]), 9);
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```
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`getMeetingTime([[[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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assert.equal(getMeetingTime([[[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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`getMeetingTime([[[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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assert.equal(getMeetingTime([[[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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# --seed--
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## --seed-contents--
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```js
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function getMeetingTime(availability) {
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return availability;
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}
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```
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# --solutions--
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```js
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function getMeetingTime(availability) {
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for (let hour = 0; hour < 24; hour++) {
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const allFree = availability.every(person =>
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person.some(([start, end]) => start <= hour && hour + 1 <= end)
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);
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if (allFree) return hour;
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}
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return "None";
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}
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```
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