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之前对于二叉树的前中后遍历,一直停留在学生时代,给定一个二叉树,能够从ABCD中选出正确答案,但是要写出递归代码,总是把自己给递进去归不来,那种深深的挫败感一直停留在对算法的黑洞里。第二周的作业,在求解LeetCode671. Second Minimum Node In a Binary Tree时,忽然想到了王争老师第三章的课件中对于二叉树遍历的讲解,四五行代码,那种感觉,简单优雅,豁然开朗。于我个人而言,这是我这周最大的收获!
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049_week02_homework #414
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049_week02_homework #414
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