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[LeetCode] 59. Spiral Matrix II_Medium tag: array, DFS

2021-08-22 07:23  Johnson_强生仔仔  阅读(30)  评论(0编辑  收藏  举报
Given a positive integer n, generate an n x n matrix filled with elements from 1 to n2 in spiral order. Example 1: Input: n = 3 Output: [[1,2,3],[8,9,