You are given a 0-indexed 1-dimensional (1D) integer array original, and two integers, m and n. You are tasked with creating a 2-dimensional (2D) array with m rows and n columns using all the elements from original.
The elements from indices 0 to n - 1 (inclusive) of original should form the first row of the constructed 2D array, the elements from indices n to 2 * n - 1 (inclusive) should form the second row of the constructed 2D array, and so on.
Return an m x n 2D array constructed according to the above procedure, or an empty 2D array if it is impossible.
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Example 1:
\n![](\"https://assets.leetcode.com/uploads/2021/08/26/image-20210826114243-1.png\")
\n\nInput: original = [1,2,3,4], m = 2, n = 2\nOutput: [[1,2],[3,4]]\nExplanation: The constructed 2D array should contain 2 rows and 2 columns.\nThe first group of n=2 elements in original, [1,2], becomes the first row in the constructed 2D array.\nThe second group of n=2 elements in original, [3,4], becomes the second row in the constructed 2D array.\n\n\n
Example 2:
\n\n\nInput: original = [1,2,3], m = 1, n = 3\nOutput: [[1,2,3]]\nExplanation: The constructed 2D array should contain 1 row and 3 columns.\nPut all three elements in original into the first row of the constructed 2D array.\n\n\n
Example 3:
\n\n\nInput: original = [1,2], m = 1, n = 1\nOutput: []\nExplanation: There are 2 elements in original.\nIt is impossible to fit 2 elements in a 1x1 2D array, so return an empty 2D array.\n\n\n
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Constraints:
\n\n1 <= original.length <= 5 * 1041 <= original[i] <= 1051 <= m, n <= 4 * 104Compiled with clang 11 using the latest C++ 20 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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