2020-06월

[occidere]

2020-06월 LeetCode 자율풀이

[occidere]

226. Invert Binary Tree

• Go: solution.go
• Python3: solution.py

[geonyeongkim]

235. Lowest Common Ancestor of a Binary Search Tree

• source

[seungdols]

27. remove element

• https://github.com/seungdols/practice_leetcode/commit/ea596d76bd1049ffd84d4d8839bfc9a59ac082a3

야매로 풀면 leetcode에서 다 분석 하는구나...ㅋㅋㅋㅋㅋ

[geonyeongkim]

2020-06-02 화요일

938. Range Sum of BST

• source

[occidere]

2020-06-02 화요일

237. Delete Node in a Linked List

• Golang: solution.go

96. Unique Binary Search Trees

• Golang: solution.go

[geonyeongkim]

2020-06-03 수요일

617. Merge Two Binary Trees

• source

[occidere]

2020-06-03 수요일

1029. Two City Scheduling

• Golang: solution.go

[iannamkr]

2020-06-03 수요일

Database, easy(5)

1141. User Activity for the Past 30 Days I

• source

1142. User Activity for the Past 30 Days II

• source

1076. Project Employees II

• source

1083. Sales Analysis II

• source

619. Biggest Single Number

• source

[geonyeongkim]

2020-06-04 목요일

590. N-ary Tree Postorder Traversal

source

589. N-ary Tree Preorder Traversal

source

700. Search in a Binary Search Tree

source

897. Increasing Order Search Tree

source

559. Maximum Depth of N-ary Tree

source

965. Univalued Binary Tree

source

872. Leaf-Similar Trees

source

[iannamkr]

2020-06-04 목요일

Database, hard(1)

1412. Find the Quiet Students in All Exams

• source

[seungdols]

다들 쩌시네요...

Roman to Integer 실패

1108. Defanging an IP Address
      • https://github.com/seungdols/practice_leetcode/commit/5c635471d70be3a6ef208df11cb524d3f3b6f2fe

[occidere]

2020-06-04 목요일

95. Unique Binary Search Trees II

• (솔루션 참고함) 너무 어렵네요 후..
• Golang: solution.go

344. Reverse String

• Golang: solution.go
• C++11: Solution.cpp

1431. Kids With the Greatest Number of Candies

• Golang: solution.go

1389. Create Target Array in the Given Order

• Golang: solution.go

1464. Maximum Product of Two Elements in an Array

• Golang: solution.go

1395. Count Number of Teams

• Golang: solution.go

[geonyeongkim]

2020-06-05 금요일

1022. Sum of Root To Leaf Binary Numbers

source

669. Trim a Binary Search Tree

source

637. Average of Levels in Binary Tree

source

653. Two Sum IV - Input is a BST

source

[seungdols]

2020-06-05

금요일 휴가 떠나기 전 급하게... (알고리즘 푸는 감을 다 잊어버렸네요 ㅠ )

Kids With the Greatest Number of Candies

• https://github.com/seungdols/practice_leetcode/commit/101a744906168cb9bdcbfc45948ab03b900b20f5

[iannamkr]

2020-06-05 금요일

Database

• easy(1)
• hard (1)
• medium (3)

579. Find Cumulative Salary of an Employee (hard)

• source

  window 함수를 이용한 이동집계 query 잘 짜시는분 리뷰해주셔요~

1212. Team Scores in Football Tournament (medium)

• source

1270. All People Report to the Given Manager (medium)

• source

608. Tree Node (medium)

• source

1241. Number of Comments per Post (easy)

• source

[occidere]

2020-06-05 금요일

113. Path Sum II

• 노잼
• Golang: source.go

114. Flatten Binary Tree to Linked List

• 솔루션 참고함
• Golang: source.go

528. Random Pick with Weight

• 재밌는 문제
• Golang: source.go

[occidere]

2020-06-06 토요일

1450. Number of Students Doing Homework at a Given Time

• Golang: solution.go

406. Queue Reconstruction by Height

• Golang: solution.go

[geonyeongkim]

2020-06-06 토요일

538. Convert BST to Greater Tree

source

[geonyeongkim]

2020-06-07 일요일

530. Minimum Absolute Difference in BST

source

[occidere]

2020-06-07 일요일

518. Coin Change 2

• (솔루션 참고함) 이미 풀어봤던 기초문제인데.. 열받네요
• Golang: solution.go

[geonyeongkim]

2020-06-08 월요일

783. Minimum Distance Between BST Nodes

source

993. Cousins in Binary Tree

source

404. Sum of Left Leaves

source

[occidere]

2020-06-08 월요일

1470. Shuffle the Array

• Golang: solution.go

231. Power of Two

• Golang: solution.go

654 Maximum Binary Tree

• Golang: solution.go

1460 Make Two Arrays Equal by Reversing Sub-arrays

• Golang: solution.go

[iannamkr]

2020-06-08 월요일

Database

• easy(1)
• medium (1)

Algorithms

• medium (1)

1341. Movie Rating (medium)

• source

1350. Students With Invalid Departments (easy)

• source

518. Coin Change 2

• source

  성준님꺼 참고함 ㅋ.ㅋ

[seungdols]

2020-06-08

1470 Shuffle the Array

• https://github.com/seungdols/practice_leetcode/commit/dbfe532ac4a1d58863bde8f55a7cf3ea813b184d

이 문제는 공간 메모리를 많이 쓰는 단점이 있는데, in memory 해법은 좀 더 고민 해봐야겠네요.

문제 푸는 의욕이... ㄷㄷ 수신/컬렉션의 탈주 의욕이 엿보입니다. ㅋㅋㅋ

[iannamkr]

@seungdols 으아아아아악

[occidere]

2020-06-09 화요일

1436. Destination City

• Golang: solution.go

392. Is Subsequence

• Golang: solution.go

1252. Cell with Odd Values in a Matrix

• Golang: solution.go

[iannamkr]

2020-06-09 화요일

Database

• hard (1)

1159. Market Analysis II

• source

[geonyeongkim]

2020-06-09 화요일

257. Binary Tree Paths

source

543. Diameter of Binary Tree

source

[iannamkr]

2020-06-10 수요일

Database

• medium (2)
• hard (1)

1393. Capital Gain/Loss (medium)

• source

1132. Reported Posts II (medium)

• source

618. Students Report By Geography (hard)

• source

  답 참고함..끔찍한 문제야..

[geonyeongkim]

2020-06-10 수요일

437. Path Sum III

path_sum_III

572. Subtree of Another Tree

subtree_of_another_tree

501. Find Mode in Binary Search Tree

find_mode_in_binary_search_tree

687. Longest Univalue Path

longest_univalue_path

1290. Convert Binary Number in a Linked List to Integer

convert_binary_number_in_a_linked_list_to_integer

[occidere]

2020-06-10 수요일

35. Search Insert Position

• solution.go
• Solution.py

5. Longest Palindromic Substring

• O(n^2) DP 버전
  • 솔루션 참고함 🤬
  • solution.go
• O(n) Manacher's Algorithm 버전
  • solution_using_manacher.go

[occidere]

2020-06-11 목요일

75. Sort Colors

• Golang: solution.go
• C++11: Solution.cpp

1115. Print FooBar Alternately

• Java: FooBar.java

[occidere]

2020-06-12 금요일

380. Insert Delete GetRandom O(1)

• Golang: solution.go

[geonyeongkim]

2020-06-12 금요일

876. Middle of the Linked List

middle_of_the_linked_list

206. Reverse Linked List

reverse_linked_list

[geonyeongkim]

2020-06-13 토요일

21. Merge Two Sorted Lists

merge_two_sorted_lists

83. Remove Duplicates from Sorted List

remove_duplicates_from_sorted_list

[occidere]

2020-06-13 토요일

368. Largest Divisible Subset

• (솔루션 참고함) 어렵네요 하..
• Golang: solution.go

[geonyeongkim]

2020-06-14 일요일

141. Linked List Cycle

linked_list_cycle

[seungdols]

2020-06-14 일요일

• 5453.Running sum of 1d Array
  • https://github.com/seungdols/practice_leetcode/commit/8993c3dd1261e72c498dfa95d05fb3922cac4e44
• 1365 how many numbers are smaller than the current number
  • https://github.com/seungdols/practice_leetcode/commit/21324cd2489654adb12a59f78335d01397c208c1

[occidere]

2020-06-14 일요일

787. Cheapest Flights Within K Stops

• (솔루션 참고함) 😥
• Java: Solution.java

[geonyeongkim]

2020-06-15 월요일

160. Intersection of Two Linked Lists

intersection_of_two_linked_lists

234. Palindrome Linked List

palindrome_linked_list

[occidere]

2020-06-15 월요일

700. Search in a Binary Search Tree

• C++11 (DFS): Solution.cpp
• Golang (BFS): solution.go

[seungdols]

2020-06-15 월요일

1389 create target array in the given order

• https://github.com/seungdols/practice_leetcode/commit/4f0cd512167b8d3da636a6bf440164de64fea71a

[occidere]

2020-06-16 화요일

468. Validate IP Address

• Golang: solution.go

[geonyeongkim]

2020-06-16 화요일

225. Implement Stack using Queues

implement_stack_using_queues

[occidere]

2020-06-17 수요일

130. Surrounded Regions

• Golang: solution.go

[geonyeongkim]

2020-06-17 수요일

1002. Find Common Characters

find_common_characters

1365. How Many Numbers Are Smaller Than the Current Number

how_many_numbers_are_smaller_than_the_current_number

771. Jewels and Stones

jewels_and_stones

961. N-Repeated Element in Size 2N Array

n_repeated_element_in_size_2n_array

1207. Unique Number of Occurrences

unique_number_of_occurrences

[occidere]

2020-06-18 목요일

274. H-Index

• Solution 참고함 😢
• Golang: solution.go

275. H-Index II

• Solution 참고함 😢
• Golang: solution.go

[geonyeongkim]

2020-06-18 목요일

1480. Running Sum of 1d Array

running_sum_of_1d_array

[geonyeongkim]

2020-06-19 금요일

463. Island Perimeter

islandperimeter

884. Uncommon Words from Two Sentences

uncommon_words_from_two_sentences

706. Design HashMap

design_hashmap

705. Design HashSet

design_hashset

[occidere]

2020-06-19 금요일

937. Reorder Data in Log Files

• Golang: solution.go

1192. Critical Connections in a Network

• (솔루션 참고함) 아마존 기출 Tarjan 알고리즘 (scc) 변형인데 엄청 어렵네요..ㅠ
• Python3: solution.py