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Day 3 | 6/26 #6

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@tech-cow

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预算:
Medium开始,刷题前,先总结下返回left,和right的机制。

刷题总结:
没错,今天一题都没有做出来,难度跳跃有点大,明天不刷题,巩固基础Binary Search定义。。。

搁浅的题目:
454 4Sum II # 这题更偏向Hash 表解法,Binary Search解法太牵强
392 Is Subsequence 还没刷到DP
230 Kth Smallest Element in a BST 还没刷到树

答案看不懂
378 Kth Smallest Element in a Sorted Matrix 45.8% Medium 这题用Priority Queue比较好做,Binary Search的答案目前看不懂 答案
287 Find the Duplicate Number 44.9% Medium 鸽笼原理....WTF

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