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[LeetCode] 1286. Iterator for Combination
Design the CombinationIterator class: CombinationIterator(string characters, int combinationLength) Initializes the object with a string characters of sorted distinct lowercase English letters and a number combinationLength as arguments. next() ReLeetCode 1286. 字母组合迭代器（回溯/位运算）
文章目录1. 题目2. 解题2.1 回溯2.2 位运算 1. 题目 请你设计一个迭代器类，包括以下内容： 一个构造函数，输入参数包括：一个 有序且字符唯一 的字符串 characters（该字符串只包含小写英文字母）和一个数字 combinationLength 。 函数 next() ，按 字典序 返回长度为 combinationLengt【leetcode】1286. Iterator for Combination
题目如下： Design an Iterator class, which has: A constructor that takes a string characters of sorted distinct lowercase English letters and a number combinationLength as arguments. A function next() that returns the next combination of length combi