First Unique Number

You have a queue of integers, you need to retrieve the first unique integer in the queue. Implement the FirstUnique class: FirstUnique(int[] nums) Initializes the object with the numbers in the queue. int showFirstUnique() returns the value of the first unique integer of the queue, and returns -1 if there is no such integer. void add(int value) insert value to the queue. Example 1: Example 2: Solution …

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