摘要：
Given a binary tree, flatten it to a linked list in-place. For example, given the following tree: 1 / \ 2 5 / \ \ 3 4 6 The flattened tree should look 阅读全文
posted @ 2019-04-14 16:38
小白兔云
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摘要：
You are given a perfect binary tree where all leaves are on the same level, and every parent has two children. The binary tree has the following defin 阅读全文
posted @ 2019-04-14 15:51
小白兔云
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摘要：
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. Note: A leaf is a node with no children. Exampl 阅读全文
posted @ 2019-04-14 15:08
小白兔云
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