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树的打印函数好像对null处理有点问题，麻烦大佬帮看下

Open 1580923067 opened this issue 5 years ago • 1 comments

例如Leetcode94题，输入: [1,null,2,3]，调用TreeNode.print( )函数，3会丢失

1580923067 avatar Aug 08 '20 14:08 1580923067