54. Spiral Matrix
Given an m x n matrix, return all elements of the matrix in spiral order. Example 1: Input: matrix = [[1,2,3],[4,5,6],[7,8,9]] Output: [1,2,3,6,9,8,7,4,5] Example 2: Input: matrix = [[1,2,3,4],[5,6,7,8],[9,10,11,12]] Output: [1,2,3,4,8,12,11,10,9,5,6,7] Constraints: - m == matrix.length - n == matrix[i].length - 1 <= m, n <= 10 - -100 <= matrix[i][j] <= 100
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solution.cppC++17
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