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https://github.com/aurelius84/leetcode

LeetCode Is Precious deposits
https://github.com/aurelius84/leetcode

leetcode leetcode-java leetcode-python

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LeetCode Is Precious deposits

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# LeetCode Is Precious deposits

## A group of Bupt coders, Coding every day!！



- **The overall plan is as follows：**

  - One day a question

  - In units of weeks, where the ratio of easy, medium, hard is 3: 2: 2

  - 8 o'clock every morning to publish the question, at 11 pm given the best submission today



- **Title type order：**

  - The first stage：array、string、tree、linkedlist、math

  - The second stage：HashTable、SortTopological Sort、Graph、Trie、MiniMax、Stack、Queue

  - The third stage：Binary Search、Two Pointers、Heap、Binary Search Tree、Binary Indexed Tree、Recursion、Greedy、Union Find、Map

  - The fourth stage：Depth-first Search、Breadth-first Search、Design、Backtracking、Dynamic Programming、Divide and Conquer、Segment Tree、Reservior sampling、Geometry、Memoization、Bit Manipulation



## First Week (array)

- [643. Maximum Average Subarray I](https://leetcode.com/problems/maximum-average-subarray-i/description/) (Easy)

- [611. Valid Triangle Number I](https://leetcode.com/problems/valid-triangle-number/description/) (Medium)

- [605. Can Place Flowers ](https://leetcode.com/problems/valid-triangle-number/description/) (Easy)

- [565. Array Nesting ](https://leetcode.com/problems/array-nesting/description/) (Medium)

- [41. First Missing Positive](https://leetcode.com/problems/first-missing-positive/description/) (Hard)

- [57. Insert Interval](https://leetcode.com/problems/insert-interval/description/) (Hard)



## Second Week (array)

- [661. Image Smoother](https://leetcode.com/problems/image-smoother/description/)(Easy)

- [495. Teemo Attacking](https://leetcode.com/problems/teemo-attacking/description/)(Medium)

- [560. Subarray Sum Equals K](https://leetcode.com/problems/subarray-sum-equals-k/description/)(Medium)

- [268. Missing Number](https://leetcode.com/problems/missing-number/description/)(Easy)

- [442. Find All Duplicates in an Array](https://leetcode.com/problems/find-all-duplicates-in-an-array/description/)(Medium)

- [537. Complex Number Multiplication ](https://leetcode.com/problems/complex-number-multiplication/description/)(Medium)

- [657. Judge Route Circle ](https://leetcode.com/problems/judge-route-circle/description/)(Easy)



## Third Week (string)

- [647. Palindromic Substrings ](https://leetcode.com/problems/palindromic-substrings/description/)(Medium)

- [632. Smallest Range ](https://leetcode.com/problems/smallest-range/description/)(Hard)

- [632. Construct String from Binary Tree ](https://leetcode.com/problems/construct-string-from-binary-tree/description/)(Easy)

- [551. Student Attendance Record I ](https://leetcode.com/problems/student-attendance-record-i/description/)(Easy)

- [583. Delete Operation for Two Strings](https://leetcode.com/problems/delete-operation-for-two-strings/description/)(Medium)

- [115. Distinct Subsequences](https://leetcode.com/problems/distinct-subsequences/description/)(Hard)

- [541. Reverse String II](https://leetcode.com/problems/reverse-string-ii/description/)(Easy)



## Forth Week (string)

- [557. Reverse Words in a String III](https://leetcode.com/problems/reverse-words-in-a-string-iii/description/)(Easy)

- [609. Find Duplicate File in System](https://leetcode.com/problems/find-duplicate-file-in-system/description/)(Medium)

- [564. Find the Closest Palindrome](https://leetcode.com/problems/find-the-closest-palindrome/)(Hard)

- [28. Implement strStr()](https://leetcode.com/problems/implement-strstr/description/)(Easy)

- [22. Generate Parentheses](https://leetcode.com/problems/generate-parentheses/description/)(Medium)

- [345. Reverse Vowels of a String](https://leetcode.com/problems/reverse-vowels-of-a-string/description/)(Easy)

- [97. Interleaving String](https://leetcode.com/problems/interleaving-string/description/)(Hard)



## Fifth Week (tree)

- [38. Count and Say](https://leetcode.com/problems/count-and-say/hints/)(Easy)

- [662. Maximum Width of Binary Tree ](https://leetcode.com/problems/maximum-width-of-binary-tree/description/)(Medium)

- [654. Maximum Binary Tree ](https://leetcode.com/problems/maximum-binary-tree/description/)(Medium)

- [111. Minimum Depth of Binary Tree](https://leetcode.com/problems/minimum-depth-of-binary-tree/description/)(easy)

- [99. Recover Binary Search Tree ](https://leetcode.com/problems/recover-binary-search-tree/description/)(Hard)

- [297. Serialize and Deserialize Binary Tree ](https://leetcode.com/problems/serialize-and-deserialize-binary-tree/description/)(Hard)

- [669. Trim a Binary Search Tree](https://leetcode.com/problems/trim-a-binary-search-tree/description/)(Easy)



## Sixth Week (tree)

- [515. Find Largest Value in Each Tree Row](https://leetcode.com/problems/find-largest-value-in-each-tree-row/description/)(Medium)

- [145. Binary Tree Postorder Traversal](https://leetcode.com/problems/binary-tree-postorder-traversal/description/)(Hard)

- [501. Find Mode in Binary Search Tree](https://leetcode.com/problems/find-mode-in-binary-search-tree/description/)(Easy)

- [513. Find Bottom Left Tree Value](https://leetcode.com/problems/find-bottom-left-tree-value/description/)(Medium)

- [124. Binary Tree Maximum Path Sum](https://leetcode.com/problems/binary-tree-maximum-path-sum/description/)(Hard)

- 周六？？

- [112. Path Sum](https://leetcode.com/problems/path-sum/description/)(Easy)



## Seventh Week (hashtable)

- 周一？？

- [525. Contiguous Array](https://leetcode.com/problems/contiguous-array/description/)(Medium)

- [76. Minimum Window Substring](https://leetcode.com/problems/minimum-window-substring/description/)(Hard)

- [645. Set Mismatch](https://leetcode.com/problems/set-mismatch/description/)(Easy)

- [451. Sort Characters By Frequency](https://leetcode.com/problems/sort-characters-by-frequency/description/)(Medium)



## Eighth Week(hashtale)

- [599. Minimum Index Sum of Two Lists](https://leetcode.com/problems/minimum-index-sum-of-two-lists/description/)(Easy)

- [3. Longest Substring Without Repeating Characters](https://leetcode.com/problems/minimum-index-sum-of-two-lists/description/)(Medium)

- [18. 4Sum](https://leetcode.com/problems/4sum/description/)(Medium)

- [15. 3Sum](https://leetcode.com/problems/3sum/description/)(Medium)