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tmhscs@gmail.com stacks > stackRemove4
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Remove all 4's from the stack. You may use one auxiliary stack.


stackRemove4([4, 5, 3, 2, 1]) → [5, 3, 2, 1]
stackRemove4([4]) → []
stackRemove4([]) → []

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public ArrayList<Integer> stackRemove4(ArrayList<Integer> list) { }

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