思路：倒序遍历 2 倍长度 + 取模模拟循环 + 单调栈。用 i % len 映射到真实索引，仅当 i < len 时记录答案。
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Include a link to your code (GitHub repo, gist, etc.)
Most of the fastest-growing U.S. companies didn’t raise VC early. They didn’t need to. They fueled growth with something far more sustainable: paying customers.