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tmhscs@gmail.com stacks > stack_numberOfElements
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Given a Stack of integers, return the number of elements in the stack. 

YOUR FIRST TWO LINES OF CODE MUST BE:
Stack<Integer> stack = new Stack<Integer>();
stack.addAll(list);

stack_numberOfElements([1, 2, 3, 4]) → 4
stack_numberOfElements([1, 2, 3]) → 3
stack_numberOfElements([1, 2]) → 2

...Save, Compile, Run (ctrl-enter)

public int stack_numberOfElements(List<Integer> list) { }

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