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# 思路1 记录每个tweid的时间。get的时候按时间归并

struct Node { unordered\_set followee; list tweet; }; int recent\_max, time; unordered\_map tweet\_time; unordered\_map user;

关键是设计好数据结构。最后在getNewsFeed时，根据tweet\_time找到时间进行线性归并

userId -> Node { followee set tweet list }