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medium· math-geometry Mock interview

Spiral Matrix

Given an m x n `matrix`, return all its elements in spiral order, starting at the top-left and moving clockwise.

Examples

in: matrix = [[1,2,3],[4,5,6],[7,8,9]]

out: [1,2,3,6,9,8,7,4,5]

clockwise spiral

Constraints

1 <= m, n <= 100
-1000 <= matrix[i][j] <= 1000

Hints

target: O(m*n) time⌘↩ run · ⇧⌘↩ submit