LeetCode (easy + medium) part 1

Question 1

Устно:
1) 88. Merge Sorted Array - повторил
2) 125. Valid Palindrome - пропустил (легко + низкий приоритет)
3) 680. Valid Palindrome II
344. Reverse String

Answer 1

Two Pointers (Arrays, Strings)

Question 2

26. Remove Duplicates from Sorted Array

Answer 2

Two Pointers (Arrays, Strings)

Question 3

283. Move Zeroes

Answer 3

Two Pointers (Arrays, Strings)

Question 4

Устно:
7) 167. Two Sum II - Input Array Is Sorted - повторил
Прописать:
8) 15. 3Sum - прорешал

Answer 4

Two Pointers (Arrays, Strings)

Question 5

9) 18. 4Sum - написал решение, но надо дорефакторить

Answer 5

Two Pointers (Arrays, Strings)

Question 6

443. String Compression

Answer 6

Two Pointers (Arrays, Strings)

Question 7

Устно:
12) 1. Two Sum - повторил
13) 1207. Unique Number of Occurrences - прорешал устно
14) 169. Majority Element - прорешал устно
15) 242. Valid Anagram - повторил
17) 771. Jewels and Stones - прорешал устно

Answer 7

HashMap/HashSet

Question 8

18) 560. Subarray Sum Equals K - долго не мог решить сам, разобрал решение, понятно, но не до конца

Answer 8

HashMap/HashSet

Question 9

19) 49. Group Anagrams - прорешал

Answer 9

HashMap/HashSet

Question 10

21) 67. Add Binary

Answer 10

Strings (others)

Question 11

16) 953. Verifying an Alien Dictionary -

Answer 11

HashMap/HashSet

Question 12

22) 859. Buddy Strings - прорешал

Answer 12

Strings (others)

Question 13

23) 205. Isomorphic Strings - вроде понятно, оставил на конец дня

Answer 13

Strings (others)

Question 14

24) 345. Reverse Vowels of a String - прорешал

Answer 14

Strings (others)

Question 15

25) 5. Longest Palindromic Substring - прорешал, но долго прорабатывал edge cases

Answer 15

Strings (others)

Question 16

26) 22. Generate Parentheses - прорешал

Answer 16

Strings (others)

Question 17

Устно:
34) 69. Sqrt(x)
35) 704. Binary Search
36) 278. First Bad Version
37) 162. Find Peak Element - решил, но в решебнике проще

Answer 17

Binary Search

Question 18

38) 852. Peak Index in a Mountain Array - аналогичная предыдущей
Valid Mountain Array https://leetcode.com/problems/valid-mountain-array

Answer 18

Binary Search

Question 19

39) 875. Koko Eating Bananas

Answer 19

Binary Search

Question 20

Longest Substring Without Repeating Characters https://leetcode.com/problems/longest-substring-without-repeating-characters

Question 21

Validate IP Address https://leetcode.com/problems/validate-ip-address

Question 22

Merge Intervals https://leetcode.com/problems/merge-intervals

Question 23

Word Pattern https://leetcode.com/problems/word-pattern

Question 24

Maximize Distance to Closest Person https://leetcode.com/problems/maximize-distance-to-closest-person