498. Diagonal Traverse

LeetCodeArrayMatrixSimulationOpen on judge ↗

Given an m x n matrix mat, return an array of all the elements of the array in a diagonal order. Example 1: Input: mat = [[1,2,3],[4,5,6],[7,8,9]] Output: [1,2,4,7,5,3,6,8,9] Example 2: Input: mat = [[1,2],[3,4]] Output: [1,2,3,4] Constraints: - m == mat.length - n == mat[i].length - 1 <= m, n <= 104 - 1 <= m * n <= 104 - -105 <= mat[i][j] <= 105

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solution.cppC++17

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