【练习】运用层序遍历解题 I

102. 二叉树的层序遍历 https://leetcode.cn/problems/binary-tree-level-order-traversal

107. 二叉树的层序遍历 II https://leetcode.cn/problems/binary-tree-level-order-traversal-ii

103. 二叉树的锯齿形层序遍历 https://leetcode.cn/problems/binary-tree-zigzag-level-order-traversal

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

662. 二叉树最大宽度 https://leetcode.cn/problems/maximum-width-of-binary-tree

515. 在每个树行中找最大值 https://leetcode.cn/problems/find-largest-value-in-each-tree-row

637. 二叉树的层平均值 https://leetcode.cn/problems/average-of-levels-in-binary-tree

958. 二叉树的完全性检验 https://leetcode.cn/problems/check-completeness-of-a-binary-tree

1161. 最大层内元素和 https://leetcode.cn/problems/maximum-level-sum-of-a-binary-tree

1302. 层数最深叶子节点的和 https://leetcode.cn/problems/deepest-leaves-sum

1609. 奇偶树 https://leetcode.cn/problems/even-odd-tree