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摘要： https://leetcode.com/problems/count-numbers-with-unique-digits/ class Solution { public: int countNumbersWithUniqueDigits(int n) { if (n < 1) { return 1; } ... 阅读全文

摘要： https://leetcode.com/problems/design-twitter/ class Twitter { unordered_map > follower_mp; unordered_map > followee_mp; unordered_map > > twitter_self_mp; int timestamp; public: ... 阅读全文