{ "data": { "question": { "questionId": "759", "questionFrontendId": "757", "boundTopicId": null, "title": "Set Intersection Size At Least Two", "titleSlug": "set-intersection-size-at-least-two", "content": "

You are given a 2D integer array intervals where intervals[i] = [starti, endi] represents all the integers from starti to endi inclusively.

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A containing set is an array nums where each interval from intervals has at least two integers in nums.

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Return the minimum possible size of a containing set.

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Example 1:

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\nInput: intervals = [[1,3],[3,7],[8,9]]\nOutput: 5\nExplanation: let nums = [2, 3, 4, 8, 9].\nIt can be shown that there cannot be any containing array of size 4.\n
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Example 2:

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\nInput: intervals = [[1,3],[1,4],[2,5],[3,5]]\nOutput: 3\nExplanation: let nums = [2, 3, 4].\nIt can be shown that there cannot be any containing array of size 2.\n
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Example 3:

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\nInput: intervals = [[1,2],[2,3],[2,4],[4,5]]\nOutput: 5\nExplanation: let nums = [1, 2, 3, 4, 5].\nIt can be shown that there cannot be any containing array of size 4.\n
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Constraints:

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Python 2.7.12.

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