sharmaansh21/LeetCode-3

leetcode的刷题记录

LeetCode (121/1210) → Easy 69--Medium 49--Hard 3

Algotithm exercises 🚨🚨🚨

sort by Difficulty and Acceptance

Array (47/163)

• Easy

  • 1. Two Sum
  • 121. Best Time to Buy and Sell Stock
  • 122. Best Time to Buy and Sell Stock II
  • 167. Two Sum II - Input array is sorted
  • 169. Majority Element
  • 189. Rotate Array
  • 217. Contains Duplicate
  • 268. Missing Number
  • 283. Move Zeroes
  • 448. Find All Numbers Disappeared in an Array
  • 485. Max Consecutive Ones
  • 509. Fibonacci Number
  • 561. Array Partition I
  • 566. Reshape the Matrix
  • 581. Shortest Unsorted Continuous Subarray
  • 628. Maximum Product of Three Numbers
  • 661. Image Smoother
  • 674. Longest Continuous Increasing Subsequence
  • 695. Max Area of Island
  • 697. Degree of an Array
  • 717. 1-bit and 2-bit Characters
  • 746. Min Cost Climbing Stairs
  • 766. Toeplitz Matrix
  • 830. Positions of Large Groups
  • 832. Flipping an Image
  • 905. Sort Array By Parity
  • 977.Squares of a Sorted Array
  • 1051. Height Checker
  • 1108.Defanging an IP Address
  • 1122. Relative Sort Array
  • 1252. Cells with Odd Values in a Matrix

• Medium

  • 15. 3Sum 🚨
  • 16. 3Sum Closest
  • 62. Unique Paths 🚨
  • 78. Subsets
  • 216. Combination Sum III
  • 238. Product of Array Except Self
  • 287. Find the Duplicate Number
  • 442. Find All Duplicates in an Array
  • 495. Teemo Attacking
  • 539. Minimum Time Difference
  • 565. Array Nesting
  • 667. Beautiful Arrangement II
  • 769. Max Chunks To Make Sorted
  • 890. Find and Replace Pattern
  • 950. Reveal Cards In Increasing Order

• Hard

  • 4. Median of Two Sorted Arrays.md🚨

String (22/146)

• Easy

  • 13. Roman to Integer in Math group too
  • 14. Longest Common Prefix
  • 20. Valid Parentheses
  • 344. Reverse String
  • 520. Detect Capital
  • 521. Longest Uncommon Subsequence I
  • 557. Reverse Words in a String III
  • 657. Judge Route Circle
  • 709.To Lower Case
  • 804. Unique Morse Code Words
  • 824. Goat Latin
  • 929. Unique Email Addresses
  • 1221. Split a String in Balanced Strings  

• Medium

  • 3.Longest Substring Without Repeating Characters
  • 5. Longest Palindromic Substring🚨
  • 6. ZigZag Conversion
  • 8. String to Integer (atoi)
  • 12. Integer to Roman in Math group too
  • 17. Letter Combinations of a Phone Number
  • 537. Complex Number Multiplication
  • 791. Custom Sort String

• Hard

  • 10. Regular Expression Matching🚨

Math (13/122)

• Easy

  • 7. Reverse Integer
  • 9. Palindrome Number
  • 13. Roman to Integer in String group too
  • 204. Count Primes in Hash Table group too
  • 268. Missing Number in Array group too
  • 728. Self Dividing Numbers
  • 942. DI String Match
  • 1266. Minimum Time Visiting All Points
  • 1281. Subtract the Product and Sum of Digits of an Integer  

• Medium

  • 2. Add Two Numbers in Linked List group too
  • 12. Integer to Roman in String group too
  • 535. Encode and Decode TinyURL
  • 537. Complex Number Multiplication in String group too

• Hard

Depth-first Search (3/95)

• Easy

  • 695. Max Area of Island in Array group too

• Medium

  • 513. Find Bottom Left Tree Value
  • 515. Find Largest Value in Each Tree Row

• Hard

Binary Search (6/61)

• Easy

  • 167. Two Sum II - Input array is sorted in array group too
  • 349. Intersection of Two Arrays
  • 852. Peak Index in a Mountain Array

• Medium

  • 230. Kth Smallest Element in a BST
  • 378. Kth Smallest Element in a Sorted Matrix
  • 392. Is Subsequence

• Hard

Linked List (10/34)

• Easy

  • 21. Merge Two Sorted Lists
  • 83. Remove Duplicates from Sorted List
  • 206. Reverse Linked List
  • 237. Delete Node in a Linked List
  • 1290.Convert Binary Number in a Linked List to Integer

• Medium

  • 2. Add Two Numbers
  • 19. Remove Nth Node From End of List in Two Pointers group too
  • 328. Odd Even Linked List
  • 445. Add Two Numbers II

• Hard

  • 23.Merge k Sorted Lists

Tree(10/107)

• Easy

  • 589. N-ary Tree Preorder Traversal
  • 617. Merge Two Binary Trees
  • 700. Search in a Binary Search Tree
  • 965. Univalued Binary Tree

• Medium

  • 654.Maximum Binary Tree
  • 701. Insert into a Binary Search Tree
  • 814. Binary Tree Pruning
  • 894. All Possible Full Binary Trees🚨
  • 1008. Construct Binary Search Tree from Preorder Traversal
  • 1261. Find Elements in a Contaminated Binary Tree

• Hard

Binary Search Tree(2/15)

• Easy

  • 938. Range Sum of BST

• Medium

  • 1038. Binary Search Tree to Greater Sum Tree

Hash Table(3/119)

• Easy

  • 771. Jewels and Stones
  • 1207. Unique Number of Occurrences

• Medium

  • 1261. Find Elements in a Contaminated Binary Tree in tree group too

Stack(1/48)

• Easy

  • 1021. Remove Outermost Parentheses

Backtracking(1/49)

• Medium

  • 1079. Letter Tile Possibilities🚨

Greedy(2/64)

• Medium

  • 763. Partition Labels in Two Pointers group too
  • 1282. Group the People Given the Group Size They Belong To🚨

Bit Manipulation(1/39)

• Easy

  • 461. Hamming Distance

Two Pointers(2/30)

• Medium

  • 11. Container With Most Water
  • 19. Remove Nth Node From End of List in Linked List group too

Heap(2/34)

• Medium

  • 347. Top K Frequent Elements in Stack and HashTable group too
  • 692. Top K Frequent Words in Stack and HashTable group too

other 5

• Easy

  • 595. Big Countries
  • 961. N-Repeated Element in Size 2N Array
  • 1179. Reformat Department Table🚨

• Medium

  • 797. All Paths From Source to Target🚨
  • 807. Max Increase to Keep City Skyline

• Hard