Hash Table #

No.	Title	Solution	Difficulty	TimeComplexity	SpaceComplexity	Favorite	Acceptance
0001	Two Sum	Go	Easy	O(n)	O(n)		49.1%
0003	Longest Substring Without Repeating Characters	Go	Medium	O(n)	O(1)	❤️	33.8%
0012	Integer to Roman	Go	Medium				61.4%
0013	Roman to Integer	Go	Easy				58.3%
0017	Letter Combinations of a Phone Number	Go	Medium				55.5%
0030	Substring with Concatenation of All Words	Go	Hard	O(n)	O(n)	❤️	30.9%
0036	Valid Sudoku	Go	Medium	O(n^2)	O(n^2)		56.8%
0041	First Missing Positive	Go	Hard				36.5%
0049	Group Anagrams	Go	Medium	O(n log n)	O(n)		65.9%
0073	Set Matrix Zeroes	Go	Medium				50.0%
0076	Minimum Window Substring	Go	Hard	O(n)	O(n)	❤️	40.7%
0105	Construct Binary Tree from Preorder and Inorder Traversal	Go	Medium				60.7%
0106	Construct Binary Tree from Inorder and Postorder Traversal	Go	Medium				57.4%
0126	Word Ladder II	Go	Hard				27.6%
0127	Word Ladder	Go	Hard				36.6%
0128	Longest Consecutive Sequence	Go	Medium				48.9%
0138	Copy List with Random Pointer	Go	Medium	O(n)	O(1)		50.4%
0141	Linked List Cycle	Go	Easy				46.9%
0142	Linked List Cycle II	Go	Medium				46.2%
0146	LRU Cache	Go	Medium				40.5%
0160	Intersection of Two Linked Lists	Go	Easy				53.1%
0169	Majority Element	Go	Easy				63.8%
0187	Repeated DNA Sequences	Go	Medium				46.1%
0202	Happy Number	Go	Easy	O(log n)	O(1)		54.3%
0205	Isomorphic Strings	Go	Easy	O(log n)	O(n)		42.5%
0208	Implement Trie (Prefix Tree)	Go	Medium				60.8%
0217	Contains Duplicate	Go	Easy	O(n)	O(n)		61.3%
0219	Contains Duplicate II	Go	Easy	O(n)	O(n)		42.3%
0229	Majority Element II	Go	Medium				44.0%
0242	Valid Anagram	Go	Easy	O(n)	O(n)		62.7%
0264	Ugly Number II	Go	Medium				46.1%
0268	Missing Number	Go	Easy				61.5%
0290	Word Pattern	Go	Easy	O(n)	O(n)		40.4%
0299	Bulls and Cows	Go	Medium				48.5%
0347	Top K Frequent Elements	Go	Medium	O(n)	O(n)		64.8%
0349	Intersection of Two Arrays	Go	Easy	O(n)	O(n)		70.2%
0350	Intersection of Two Arrays II	Go	Easy	O(n)	O(n)		55.5%
0383	Ransom Note	Go	Easy				57.6%
0387	First Unique Character in a String	Go	Easy				58.8%
0389	Find the Difference	Go	Easy				60.4%
0395	Longest Substring with At Least K Repeating Characters	Go	Medium				44.8%
0409	Longest Palindrome	Go	Easy				54.6%
0421	Maximum XOR of Two Numbers in an Array	Go	Medium				54.6%
0423	Reconstruct Original Digits from English	Go	Medium				51.3%
0424	Longest Repeating Character Replacement	Go	Medium				51.4%
0433	Minimum Genetic Mutation	Go	Medium				48.1%
0438	Find All Anagrams in a String	Go	Medium	O(n)	O(1)		48.9%
0447	Number of Boomerangs	Go	Medium	O(n)	O(1)		54.6%
0448	Find All Numbers Disappeared in an Array	Go	Easy				59.6%
0451	Sort Characters By Frequency	Go	Medium	O(n log n)	O(1)		68.6%
0454	4Sum II	Go	Medium	O(n^2)	O(n)		57.3%
0457	Circular Array Loop	Go	Medium				32.2%
0460	LFU Cache	Go	Hard				40.3%
0480	Sliding Window Median	Go	Hard				41.4%
0491	Increasing Subsequences	Go	Medium				52.0%
0496	Next Greater Element I	Go	Easy				71.3%
0500	Keyboard Row	Go	Easy				69.0%
0508	Most Frequent Subtree Sum	Go	Medium				64.3%
0519	Random Flip Matrix	Go	Medium				39.8%
0523	Continuous Subarray Sum	Go	Medium				27.7%
0525	Contiguous Array	Go	Medium				46.8%
0532	K-diff Pairs in an Array	Go	Medium				40.7%
0535	Encode and Decode TinyURL	Go	Medium				85.8%
0554	Brick Wall	Go	Medium				53.1%
0560	Subarray Sum Equals K	Go	Medium				44.0%
0567	Permutation in String	Go	Medium				43.8%
0575	Distribute Candies	Go	Easy				66.1%
0594	Longest Harmonious Subsequence	Go	Easy				53.1%
0599	Minimum Index Sum of Two Lists	Go	Easy				52.8%
0609	Find Duplicate File in System	Go	Medium				67.8%
0632	Smallest Range Covering Elements from K Lists	Go	Hard				60.4%
0645	Set Mismatch	Go	Easy				43.0%
0648	Replace Words	Go	Medium	O(n)	O(n)		62.7%
0653	Two Sum IV - Input is a BST	Go	Easy				60.9%
0676	Implement Magic Dictionary	Go	Medium	O(n)	O(n)		56.9%
0677	Map Sum Pairs	Go	Medium				57.0%
0690	Employee Importance	Go	Medium				65.1%
0692	Top K Frequent Words	Go	Medium				56.8%
0697	Degree of an Array	Go	Easy				55.8%
0705	Design HashSet	Go	Easy				66.0%
0706	Design HashMap	Go	Easy				65.1%
0710	Random Pick with Blacklist	Go	Hard	O(n)	O(n)		33.6%
0720	Longest Word in Dictionary	Go	Medium	O(n)	O(n)		51.8%
0726	Number of Atoms	Go	Hard	O(n)	O(n)	❤️	52.2%
0745	Prefix and Suffix Search	Go	Hard				41.3%
0748	Shortest Completing Word	Go	Easy				59.2%
0752	Open the Lock	Go	Medium				55.5%
0763	Partition Labels	Go	Medium				79.8%
0767	Reorganize String	Go	Medium				52.7%
0771	Jewels and Stones	Go	Easy				88.0%
0781	Rabbits in Forest	Go	Medium				55.3%
0791	Custom Sort String	Go	Medium				69.4%
0792	Number of Matching Subsequences	Go	Medium				51.9%
0811	Subdomain Visit Count	Go	Medium				75.1%
0815	Bus Routes	Go	Hard				45.7%
0817	Linked List Components	Go	Medium				58.1%
0819	Most Common Word	Go	Easy				45.0%
0820	Short Encoding of Words	Go	Medium				60.7%
0823	Binary Trees With Factors	Go	Medium				50.0%
0828	Count Unique Characters of All Substrings of a Given String	Go	Hard				51.6%
0846	Hand of Straights	Go	Medium				56.5%
0859	Buddy Strings	Go	Easy				29.0%
0884	Uncommon Words from Two Sentences	Go	Easy				65.9%
0888	Fair Candy Swap	Go	Easy				60.5%
0890	Find and Replace Pattern	Go	Medium				77.9%
0895	Maximum Frequency Stack	Go	Hard	O(n)	O(n)		66.8%
0904	Fruit Into Baskets	Go	Medium				42.6%
0911	Online Election	Go	Medium				52.0%
0914	X of a Kind in a Deck of Cards	Go	Easy				32.1%
0916	Word Subsets	Go	Medium				54.1%
0923	3Sum With Multiplicity	Go	Medium				45.4%
0930	Binary Subarrays With Sum	Go	Medium	O(n)	O(n)	❤️	50.9%
0953	Verifying an Alien Dictionary	Go	Easy				52.7%
0961	N-Repeated Element in Size 2N Array	Go	Easy				75.8%
0966	Vowel Spellchecker	Go	Medium				51.5%
0970	Powerful Integers	Go	Medium				43.6%
0981	Time Based Key-Value Store	Go	Medium				53.6%
0987	Vertical Order Traversal of a Binary Tree	Go	Hard				44.6%
0992	Subarrays with K Different Integers	Go	Hard	O(n)	O(n)	❤️	54.3%
0997	Find the Town Judge	Go	Easy				49.4%
1002	Find Common Characters	Go	Easy				68.3%
1010	Pairs of Songs With Total Durations Divisible by 60	Go	Medium				53.0%
1048	Longest String Chain	Go	Medium				59.2%
1054	Distant Barcodes	Go	Medium				45.7%
1074	Number of Submatrices That Sum to Target	Go	Hard				69.8%
1122	Relative Sort Array	Go	Easy				68.4%
1123	Lowest Common Ancestor of Deepest Leaves	Go	Medium				70.6%
1128	Number of Equivalent Domino Pairs	Go	Easy				46.9%
1160	Find Words That Can Be Formed by Characters	Go	Easy				67.8%
1170	Compare Strings by Frequency of the Smallest Character	Go	Medium				61.3%
1171	Remove Zero Sum Consecutive Nodes from Linked List	Go	Medium				42.9%
1178	Number of Valid Words for Each Puzzle	Go	Hard				46.6%
1189	Maximum Number of Balloons	Go	Easy				62.1%
1202	Smallest String With Swaps	Go	Medium				57.6%
1207	Unique Number of Occurrences	Go	Easy				70.9%
1275	Find Winner on a Tic Tac Toe Game	Go	Easy				54.3%
1296	Divide Array in Sets of K Consecutive Numbers	Go	Medium				56.6%
1396	Design Underground System	Go	Medium				73.7%
1442	Count Triplets That Can Form Two Arrays of Equal XOR	Go	Medium				75.6%
1461	Check If a String Contains All Binary Codes of Size K	Go	Medium				56.8%
1512	Number of Good Pairs	Go	Easy				88.2%
1600	Throne Inheritance	Go	Medium				63.7%
1624	Largest Substring Between Two Equal Characters	Go	Easy				59.0%
1636	Sort Array by Increasing Frequency	Go	Easy				68.6%
1640	Check Array Formation Through Concatenation	Go	Easy				56.1%
1656	Design an Ordered Stream	Go	Easy				85.4%
1657	Determine if Two Strings Are Close	Go	Medium				54.2%
1658	Minimum Operations to Reduce X to Zero	Go	Medium				37.6%
1674	Minimum Moves to Make Array Complementary	Go	Medium				38.5%
1679	Max Number of K-Sum Pairs	Go	Medium				57.4%
1684	Count the Number of Consistent Strings	Go	Easy				81.8%
1695	Maximum Erasure Value	Go	Medium				57.7%
1742	Maximum Number of Balls in a Box	Go	Easy				73.9%
1748	Sum of Unique Elements	Go	Easy				75.6%
1763	Longest Nice Substring	Go	Easy				61.7%
2043	Simple Bank System	Go	Medium				65.9%
2166	Design Bitset	Go	Medium				31.3%
2170	Minimum Operations to Make the Array Alternating	Go	Medium				33.2%
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