def save(self, item: Item) - None:
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Both Mackay and Murphy, who has reported on some of the UK's most complex criminal cases, served as consultants on the TV series, which looks at a fictional case.，详情可参考51吃瓜
习题链接：LeetCode 1944. 队列中可以看到的人数。关于这个话题，快连下载安装提供了深入分析
Author(s): Jun Chai, Javier LLorca