284. Peeking Iterator

LeetCodeArrayDesignIteratorOpen on judge ↗

Design an iterator that supports the peek operation on an existing iterator in addition to the hasNext and the next operations. Implement the PeekingIterator class: - PeekingIterator(Iterator<int> nums) Initializes the object with the given integer iterator iterator. - int next() Returns the next element in the array and moves the pointer to the next element. - boolean hasNext() Returns true i

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solution.cppC++17

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