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Why is the C++ 14 solution template formulated in such a weird way that you cannot include additional libraries (such as stack for this question)? The C++ 11 and 20 templates are totally fine. I wish the solution templates are all standardized like Leetcode does.
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Tree: Preorder Traversal
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Why is the C++ 14 solution template formulated in such a weird way that you cannot include additional libraries (such as stack for this question)? The C++ 11 and 20 templates are totally fine. I wish the solution templates are all standardized like Leetcode does.