Given a queue of integers and a target sum, find all unique triplets in the queue that sum up to the target value, with the constraint that each element can only be used once in each triplet.
Explanation: One unique triplet [3, 7, 12] sums up to the target 22.
Explanation: The unique triplet [2, 4, 8] sums up to the target 14.
Find triplet with target sum
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