- Know how to convert
[i, j] => i * n + j. (i*n give us total grids before the curr row then we add j to that).
i * n + j => [floor(i/n), i %n].
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
The elements from indices
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.
m x n 2D array constructed according to the above procedure, or an empty 2D array if it is impossible.
Input: original = [1,2,3,4], m = 2, n = 2