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Problem: Convert 1D Array Into 2D Array

easy
15 min
Understand how to convert a one-dimensional array into a two-dimensional matrix by organizing elements into specified rows and columns while maintaining their order. Learn to handle cases when reshaping is not possible and practice implementing this transformation efficiently.

Statement

Given a 0-indexed 1-dimensional (1D) integer array original and two integers, m and n, your task is to reshape the array into a 2-dimensional (2D) array with m rows and n columns while preserving the order of elements in original.

To construct the 2D array, the first n elements in the original should populate the first row. The next n elements should populate the second row, and so on, until all rows are filled. Your goal is to return the resulting m x n 2D array.

Note: If it is impossible to create an m x n array (e.g., if the total number of elements in the original is not equal to m * n), return an empty array.

Constraints:

  • 1<=1 <= original.length <=103<= 10^3

  • 1<=1 <= original[i] <=103<= 10^3

  • 1<=1 <= m, n <=33<= 33

Tap here to switch tabs
Problem
Ask
Submissions

Problem: Convert 1D Array Into 2D Array

easy
15 min
Understand how to convert a one-dimensional array into a two-dimensional matrix by organizing elements into specified rows and columns while maintaining their order. Learn to handle cases when reshaping is not possible and practice implementing this transformation efficiently.

Statement

Given a 0-indexed 1-dimensional (1D) integer array original and two integers, m and n, your task is to reshape the array into a 2-dimensional (2D) array with m rows and n columns while preserving the order of elements in original.

To construct the 2D array, the first n elements in the original should populate the first row. The next n elements should populate the second row, and so on, until all rows are filled. Your goal is to return the resulting m x n 2D array.

Note: If it is impossible to create an m x n array (e.g., if the total number of elements in the original is not equal to m * n), return an empty array.

Constraints:

  • 1<=1 <= original.length <=103<= 10^3

  • 1<=1 <= original[i] <=103<= 10^3

  • 1<=1 <= m, n <=33<= 33