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Leet Rabbits Codes

Day Id Title Difficulty Related Topics
Week 1
(2021-07-19 ~ 2021-07-25)
001 7 Reverse Integer Easy Math
002 9 Palindrome Number Easy Math
003 5 Longest Palindromic Substring Medium String; Dynamic Programming
004 20 Valid Parentheses Easy String; Stack
005 35 Search Insert Position Easy Array; Binary Search
006 3 Longest Substring Without Repeating Characters Medium Hash Table; String; Sliding Window
007 4 Median of Two Sorted Arrays Hard Array; Binary Search; Divide and Conquer
Week 2
(2021-07-26 ~ 2021-08-01)
008 13 Roman to Integer Easy Hash Table; Math; String
009 83 Remove Duplicates from Sorted List Easy Linked List
010 12 Integer to Roman Medium Hash Table; Math; String
011 100 Same Tree Easy Tree; Depth-First Search; Breadth-First Search; Binary Tree
012 104 Maximum Depth of Binary Tree Easy Tree; Depth-First Search; Breadth-First Search; Binary Tree
013 45 Jump Game II Medium Array; Dynamic Programming; Greedy
014 64 Minimum Path Sum Medium Array; Dynamic Programming; Matrix
Week 3
(2021-08-02 ~ 2021-08-08)
015 21 Merge Two Sorted Lists Easy Linked List; Recursion
016 48 Rotate Image Medium Array; Math; Matrix
017 2 Add Two Numbers Medium Linked List; Math; Recursion
018 1 Two Sum Easy Array; Hash Table
019 23 Merge k Sorted Lists Hard Linked List; Divide and Conquer; Heap (Priority Queue); Merge Sort
020 387 First Unique Character in a String Easy Hash Table; String; Queue; Counting
021 341 Flatten Nested List Iterator Medium Stack; Tree; Depth-First Search; Design; Queue; Iterator
Week 4
(2021-08-09 ~ 2021-08-15)
022 148 Sort List Medium Linked List; Two Pointers; Divide and Conquer; Sorting; Merge Sort
023 98 Validate Binary Search Tree Medium Tree; Depth-First Search; Binary Search Tree; Binary Tree
024 101 Symmetric Tree Easy Tree; Depth-First Search; Breadth-First Search; Binary Tree
025 49 Group Anagrams Medium Hash Table; String; Sorting
026 141 Linked List Cycle Easy Hash Table; Linked List; Two Pointers
027 22 Generate Parentheses Medium String; Dynamic Programming; Backtracking
028 26 Remove Duplicates from Sorted Array Easy Array; Two Pointers
Week 5
(2021-08-16 ~ 2021-08-22)
029 94 Binary Tree Inorder Traversal Easy Stack; Tree; Depth-First Search; Binary Tree
030 326 Power of Three Easy Math; Recursion
031 136 Single Number Easy Array; Bit Manipulation
032 268 Missing Number Easy Array; Hash Table; Math; Bit Manipulation; Sorting
033 287 Find the Duplicate Number Medium Array; Two Pointers; Binary Search; Bit Manipulation
034 215 Kth Largest Element in an Array Medium Array; Divide and Conquer; Sorting; Heap (Priority Queue); Quickselect
035 1039 Find the Town Judge Easy Array; Hash Table; Graph
Week 6
(2021-08-23 ~ 2021-08-29)
036 121 Best Time to Buy and Sell Stock Easy Array; Dynamic Programming
037 122 Best Time to Buy and Sell Stock II Easy Array; Dynamic Programming; Greedy
038 123 Best Time to Buy and Sell Stock III Hard Array; Dynamic Programming
039 70 Climbing Stairs Easy Math; Dynamic Programming; Memoization
040 747 Min Cost Climbing Stairs Easy Array; Dynamic Programming
041 55 Jump Game Medium Array; Dynamic Programming; Greedy
042 Binary Heap
Week 7
(2021-08-30 ~ 2021-09-05)
043 118 Pascal's Triangle Easy Array; Dynamic Programming
044 119 Pascal's Triangle II Easy Array; Dynamic Programming
045 1086 Divisor Game Easy Math; Dynamic Programming; Brainteaser; Game Theory
046 242 Valid Anagram Easy Hash Table; String; Sorting
047 160 Intersection of Two Linked Lists Easy Hash Table; Linked List; Two Pointers
048 205 Isomorphic Strings Easy Hash Table; String
049 290 Word Pattern Easy Hash Table; String
Week 8
(2021-09-06 ~ 2021-09-12)
050 169 Majority Element Easy Array; Hash Table; Divide and Conquer; Sorting; Counting
051 350 Intersection of Two Arrays II Easy Array; Hash Table; Two Pointers; Binary Search; Sorting
052 105 Construct Binary Tree from Preorder and Inorder Traversal Medium Array; Hash Table; Divide and Conquer; Tree; Binary Tree
053 66 Plus One Easy Array; Math
054 155 Min Stack Easy Stack; Design
055 150 Evaluate Reverse Polish Notation Medium Array; Math; Stack
056 227 Basic Calculator II Medium Math; String; Stack
Week 9
(2021-09-13 ~ 2021-09-19)
057 1802 Number of Students Unable to Eat Lunch Easy Array; Stack; Queue; Simulation
058 234 Palindrome Linked List Easy Linked List; Two Pointers; Stack; Recursion
059 71 Simplify Path Medium String; Stack
060 28 Implement strStr() Easy Two Pointers; String; String Matching
061 168 Excel Sheet Column Title Easy Math; String
062 933 Number of Recent Calls Easy Design; Queue; Data Stream
063 860 Design Circular Queue Medium Array; Linked List; Design; Queue
Week 10
(2021-09-20 ~ 2021-09-27)
064 239 Sliding Window Maximum Hard Array; Queue; Sliding Window; Heap (Priority Queue); Monotonic Queue
065 338 Counting Bits Easy Dynamic Programming; Bit Manipulation
066 392 Is Subsequence Easy Two Pointers; String; Dynamic Programming
067 1769 Get Maximum in Generated Array Easy Array; Dynamic Programming; Simulation
068 62 Unique Paths Medium Math; Dynamic Programming; Combinatorics
069 120 Triangle Medium Array; Dynamic Programming
070 53 Maximum Subarray Easy Array; Divide and Conquer; Dynamic Programming
Week 11
(2021-09-28 ~ 2021-10-04)
071 561 Array Partition I Easy Array; Greedy; Sorting; Counting Sort
072 46 Permutations Medium Array; Backtracking
073 800 Letter Case Permutation Medium String; Backtracking; Bit Manipulation
074 813 All Paths From Source to Target Medium Backtracking; Depth-First Search; Breadth-First Search; Graph
075 1160 Letter Tile Possibilities Medium String; Backtracking
076 1211 Iterator for Combination Medium String; Backtracking; Design; Iterator
077 1516 The k-th Lexicographical String of All Happy Strings of Length n Medium String; Backtracking
Week 12
(2021-10-05 ~ 2021-10-12)
078 455 Assign Cookies Easy Array; Greedy; Sorting
079 605 Can Place Flowers Easy Array; Greedy
080 409 Longest Palindrome Easy Hash Table; String; Greedy
081 1341 Split a String in Balanced Strings Easy String; Greedy; Counting
082 11 Container With Most Water Medium Array; Two Pointers; Greedy
083 179 Largest Number Medium String; Greedy; Sorting
084 1062 Partition Array Into Three Parts With Equal Sum Easy Array; Greedy
Week 13
(2021-10-13 ~ 2021-10-23)
085 404 Sum of Left Leaves Easy Tree; Depth-First Search; Breadth-First Search; Binary Tree
086 257 Binary Tree Paths Easy String; Tree; Depth-First Search; Binary Tree
087 904 Leaf-Similar Trees Easy Tree; Depth-First Search; Binary Tree
088 563 Binary Tree Tilt Easy Tree; Depth-First Search; Binary Tree
089 1005 Univalued Binary Tree Easy Tree; Depth-First Search; Breadth-First Search; Binary Tree
090 783 Search in a Binary Search Tree Easy Tree; Binary Search Tree; Binary Tree
091 775 N-ary Tree Preorder Traversal Easy Stack; Tree; Depth-First Search
Week 14
(2021-10-25 ~ 2022-01-12)
092 799 Minimum Distance Between BST Nodes Easy Tree; Depth-First Search; Breadth-First Search; Binary Search Tree; Binary Tree
093 933 Increasing Order Search Tree Easy Stack; Tree; Depth-First Search; Binary Search Tree; Binary Tree
094 1916 Find Center of Star Graph Easy Graph
095 2121 Find if Path Exists in Graph Easy Depth-First Search; Breadth-First Search; Graph
096 389 Find the Difference Easy Hash Table; String; Bit Manipulation; Sorting
097 383 Ransom Note Easy Hash Table; String; Counting
098 322 Coin Change Medium Array; Dynamic Programming; Breadth-First Search
Week 15
(2022-01-14 ~ )
099 221 Maximal Square Medium Array; Dynamic Programming; Matrix
100 97 Interleaving String Medium String; Dynamic Programming

Summary