1286. Iterator for Combination

LeetCodeStringBacktrackingDesignIteratorOpen on judge ↗

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() Returns the next combination of length combinationLength in lexicographical order. - hasNext() Returns true if and only if there exists a next combi

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solution.cppC++17

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