{ "data": { "question": { "questionId": "2724", "questionFrontendId": "2610", "boundTopicId": null, "title": "Convert an Array Into a 2D Array With Conditions", "titleSlug": "convert-an-array-into-a-2d-array-with-conditions", "content": "

You are given an integer array nums. You need to create a 2D array from nums satisfying the following conditions:

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Return the resulting array. If there are multiple answers, return any of them.

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Note that the 2D array can have a different number of elements on each row.

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Example 1:

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\nInput: nums = [1,3,4,1,2,3,1]\nOutput: [[1,3,4,2],[1,3],[1]]\nExplanation: We can create a 2D array that contains the following rows:\n- 1,3,4,2\n- 1,3\n- 1\nAll elements of nums were used, and each row of the 2D array contains distinct integers, so it is a valid answer.\nIt can be shown that we cannot have less than 3 rows in a valid array.
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Example 2:

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\nInput: nums = [1,2,3,4]\nOutput: [[4,3,2,1]]\nExplanation: All elements of the array are distinct, so we can keep all of them in the first row of the 2D array.\n
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Constraints:

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Compiled with clang 11 using the latest C++ 20 standard.

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Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.

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Most standard library headers are already included automatically for your convenience.

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OpenJDK 17. Java 8 features such as lambda expressions and stream API can be used.

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Python 2.7.12.

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Most standard library headers are already included automatically for your convenience.

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For hash table operations, you may use uthash. \\\"uthash.h\\\" is included by default. Below are some examples:

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3. Deleting an item in a hash:\\r\\n

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C# 10 with .NET 6 runtime

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Node.js 16.13.2.

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Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms

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Python 3.10.

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Rust 1.58.1

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Dart 2.17.3

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