Spiral Matrix Printing

MediumPython

Problem

How would you print a matrix in spiral order?

Implement spiral_order(matrix) to return the elements of a rectangular matrix in clockwise spiral order, starting at the top-left corner. The input is a list of row lists, and the output must be a flat list. Handle single-row, single-column, rectangular, and empty matrices without revisiting elements.

Constraints

0 <= len(matrix) <= 100
If matrix is non-empty, 1 <= len(matrix[0]) <= 100
All rows have the same length
Matrix values are integers

Function Signature

def spiral_order(matrix):

CodePython 3

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