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leetcode_notes

记录每日一题和周赛刷题思路和代码,leetcode主页:https://leetcode-cn.com/u/lovelyfrog/

2020.09.18

2020.09.17

  • 每日一题,没有完成,并查集有点忘了

2020.09.16

  • 完成每日一题,翻转二叉树,很简单的递归

2020.09.15

  • 完成每日一题,解数独

2020.09.14

  • 完成每日一题,二叉树的中序遍历,迭代写法。

  • 完成LCP19, 秋叶收藏集,典型的DP

2020.09.13

  • 完成每日一题:79 单词搜索,dfs回溯

  • 完成组合总和IV

  • 完成昨天第二题二分写法

2020.09.12

  • 完成每日一题:637. 二叉树的层平均值,dfs,bfs都可以

  • 参加leetcode年度个人赛,只A了前两道题。一道简单题,一道双指针。

2020.09.11

  • 完成每日一题:216. 组合总和III,又是回溯

  • 完成 1576.替换所有的问号,简单题

2020.09.10:

  • 完成每日一题:40.组合总和II,又是回溯,这个月回溯好多

2020.09.09:

  • 完成每日一题:39. 组合总和,又是回溯

2020.09.08:

  • 完成每日一题:77. 组合,典型的回溯

2020.09.07:

  • 完成每日一题:347.前K个高频元素。使用最大堆,很简单。

2020.09.06:

  • 完成每日一题,二叉树的层序遍历II,用队列很简单

  • 完成昨日周赛第四题,典型的背包问题,递归+memo很好解决

2020.09.05:

  • 完成每日一题:60.第k个排列,思路很简单,写的时候遇到了一个坑。

  • 打了双周赛,第三题看错题气死我了。

2020.09.04:

  • 完成988 从叶结点开始的最小字符串,回溯

  • 完成每日一题,之前做过,回溯。

2020.09.03:

  • 完成上周周赛第四题,溢出着实恶心。

  • 完成每日一题,回溯算法,一开始老是超时

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