原文链接: https://leetcode-cn.com/problems/binary-search-tree-iterator
英文原文Implement the BSTIterator class that represents
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迭代器 分类
原文链接: https://leetcode-cn.com/problems/peeking-iterator
英文原文Design an iterator that supports the peek operation on an
原文链接: https://leetcode-cn.com/problems/flatten-nested-list-iterator
英文原文You are given a nested list of integers nested
原文链接: https://leetcode-cn.com/problems/rle-iterator
英文原文We can use run-length encoding (i.e., RLE) to encode a sequenc
原文链接: https://leetcode-cn.com/problems/iterator-for-combination
英文原文Design the CombinationIterator class:
Combin
原文链接: https://leetcode-cn.com/problems/kTOapQ
中文题目实现一个二叉搜索树迭代器类BSTIterator ，表示一个按中序遍历二叉搜索树（BST）的迭代器：
BSTIterat
