Leetcode-Ruby

Leetcode Solutions in Ruby

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Easy

LC #	Description
1108	Defanging an IP Address
938	Range Sum of BST
1614	Maximum Nesting Depth of the Parentheses
1832	Check if the Sentence Is Pangram
21	Merge Two Sorted Lists
141	Linked List Cycle
20	Valid Parentheses
617	Merge Two Binary Trees
897	Increasing Order Search Tree
346	Moving Average from Data Stream
1748	Sum of Unique Elements
1351	Count Negative Numbers in a Sorted Matrix
905	Sort Array By Parity
344	Reverse String
1460	Make Two Arrays Equal by Reversing Sub-arrays
104	Maximum Depth of Binary Tree
977	Squares of a Sorted Array
226	Invert Binary Tree
1047	Remove All Adjacent Duplicates In String
206	Reverse Linked List
496	Next Greater Element I
136	Single Number
463	Island Perimeter
349	Intersection of Two Arrays
637	Average of Levels in Binary Tree
1002	Find Common Characters
509	Fibonacci Number
766	Toeplitz Matrix
704	Binary Search
1160	Find Words That Can Be Formed by Characters
412	Fizz Buzz
266	Palindrome Permutation
145	Binary Tree Postorder Traversal
169	Majority Element
242	Valid Anagram
217	Contains Duplicate
283	Move Zeroes
1260	Shift 2D Grid
700	Search in a Binary Search Tree
706	Design HashMap
844	Backspace String Compare
191	Number of 1 Bits
1480	Running Sum of 1d Array
160	Intersection of Two Linked Lists
88	Merge Sorted Array
1332	Remove Palindromic Subsequences
1925	Count Square Sum Triples
859	Buddy Strings
118	Pascal's Triangle
557	Reverse Words in a String III
1137	N-th Tribonacci Number
976	Largest Perimeter Triangle
219	Contains Duplicate II
645	Set Mismatch
1662	Check If Two String Arrays are Equivalent
1929	Concatenation of Array

Medium

LC #	Description
78	Subsets
82	Remove Duplicates from Sorted List II
138	Copy List with Random Pointer
946	Validate Stack Sequences
316	Remove Duplicate Letters
763	Partition Labels
1007	Minimum Domino Rotations For Equal Row
991	Broken Calculator
1663	Smallest String With A Given Numeric Value
881	Boats to Save People
81	Search in Rotated Sorted Array II
287	Find the Duplicate Number
74	Search a 2D Matrix
1721	Swapping Nodes in a Linked List
11	Container With Most Water
538	Convert BST to Greater Tree
230	Kth Smallest Element in a BST
535	Encode and Decode TinyURL
284	Peeking Iterator
341	Flatten Nested List Iterator
216	Combination Sum III
47	Permutations II
743	Network Delay Time
1302	Deepest Leaves Sum
1461	Check If a String Contains All Binary Codes of Size K
167	Two Sum II - Input Array Is Sorted
3	Longest Substring Without Repeating Characters
1658	Minimum Operations to Reduce X to Zero
1695	Maximum Erasure Value
120	Triangle
583	Delete Operation for Two Strings
1048	Longest String Chain
5	Longest Palindromic Substring
820	Short Encoding of Words
215	Kth Largest Element in an Array
1570	Dot Product of Two Sparse Vectors
339	Nested List Weight Sum
1382	Balance a Binary Search Tree
1762	Buildings With an Ocean View
665	Non-decreasing Array
1423	Maximum Points You Can Obtain from Cards
199	Binary Tree Right Side View
102	Binary Tree Level Order Traversal
105	Construct Binary Tree from Preorder and Inorder Traversal
92	Reverse Linked List II
236	Lowest Common Ancestor of a Binary Tree
114	Flatten Binary Tree to Linked List
86	Partition List
34	Find First and Last Position of Element in Sorted Array
890	Find and Replace Pattern
307	Range Sum Query - Mutable
240	Search a 2D Matrix II
62	Unique Paths
1457	Pseudo-Palindromic Paths in a Binary Tree
113	Path Sum II
622	Design Circular Queue
990	Satisfiability of Equality Equations
19	Remove Nth Node From End of List
658	Find K Closest Elements
91	Decode Ways
1578	Minimum Time to Make Rope Colorful
16	3Sum Closest
1328	Break a Palindrome
653	Two Sum IV - Input is a BST
334	Increasing Triplet Subsequence
2095	Delete the Middle Node of a Linked List
38	Count and Say
1239	Maximum Length of a Concatenated String with Unique Characters
523	Continuous Subarray Sum
49	Group Anagrams
433	Minimum Genetic Mutation

Hard

LC #	Description
410	Split Array Largest Sum
32	Longest Valid Parentheses
968	Binary Tree Cameras
76	Minimum Window Substring
2136	Earliest Possible Day of Full Bloom