代码随想录算法训练营第十五天｜层序遍历、226.翻转二叉树、101. 对称二叉树

层序遍历：

102.二叉树的层序遍历

https://leetcode.cn/problems/binary-tree-level-order-traversal/

107.二叉树的层次遍历II

https://leetcode.cn/problems/binary-tree-level-order-traversal-ii/submissions/

199.二叉树的右视图

https://leetcode.cn/problems/binary-tree-right-side-view/

637.二叉树的层平均值

https://leetcode.cn/problems/average-of-levels-in-binary-tree/submissions/

429.N叉树的层序遍历

https://leetcode.cn/problems/n-ary-tree-level-order-traversal/submissions/

515.在每个树行中找最大值

https://leetcode.cn/problems/find-largest-value-in-each-tree-row/submissions/

116.填充每个节点的下一个右侧节点指针

https://leetcode.cn/problems/populating-next-right-pointers-in-each-node/submissions/

117.填充每个节点的下一个右侧节点指针II

https://leetcode.cn/problems/populating-next-right-pointers-in-each-node-ii/submissions/

104.二叉树的最大深度

https://leetcode.cn/problems/maximum-depth-of-binary-tree/submissions/

111.二叉树的最小深度

https://leetcode.cn/problems/minimum-depth-of-binary-tree/submissions/

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