Dashboard Questions Topics Companies Sheets

Hash Table

Topic

645 coding problems covering Hash Table concepts. Master this topic and improve your problem-solving skills.

645

Problems

158

Easy

383

Medium

104

Hard

Difficulty

All645 Easy158 Medium383 Hard104

Title	Solve	Difficulty	Companies	Topics
30. Substring with Concatenation of All Words	Solve	Hard	Amazon+4	Hash Table Sliding Window+1
37. Sudoku Solver	Solve	Hard	Adobe+11	Array Backtracking+2
41. First Missing Positive	Solve	Hard	Adobe+7	Array Hash Table
76. Minimum Window Substring	Solve	Hard	Adobe+9	Hash Table Sliding Window+1
126. Word Ladder II	Solve	Hard	Amazon+4	Backtracking Breadth-First Search+2
127. Word Ladder	Solve	Hard	Adobe+8	Breadth-First Search Hash Table+1
140. Word Break II	Solve	Hard	Adobe+7	Array Backtracking+5
149. Max Points on a Line	Solve	Hard	Amazon+4	Array Geometry+2
305. Number of Islands II	Solve	Hard	Google+1	Array Hash Table+1
336. Palindrome Pairs	Solve	Hard	Airbnb+5	Array Hash Table+2
358. Rearrange String k Distance Apart	Solve	Hard	Google+3	Counting Greedy+4
381. Insert Delete GetRandom O(1) - Duplicates allowed	Solve	Hard	Affirm+2	Array Design+3
432. All O`one Data Structure	Solve	Hard	Amazon+2	Design Doubly-Linked List+2
460. LFU Cache	Solve	Hard	Amazon+9	Design Doubly-Linked List+2
480. Sliding Window Median	Solve	Hard	Facebook+3	Array Hash Table+2
548. Split Array with Equal Sum	Solve	Hard	Facebook	Array Hash Table+1
588. Design In-Memory File System	Solve	Hard	Amazon+5	Design Hash Table+3
632. Smallest Range Covering Elements from K Lists	Solve	Hard	Adobe+8	Array Greedy+4
710. Random Pick with Blacklist	Solve	Hard	Amazon+2	Array Binary Search+4
711. Number of Distinct Islands II	Solve	Hard	Amazon+1	Breadth-First Search Depth-First Search+3
726. Number of Atoms	Solve	Hard	Amazon+5	Hash Table Sorting+2
736. Parse Lisp Expression	Solve	Hard	Affirm	Hash Table Recursion+2
745. Prefix and Suffix Search	Solve	Hard	Facebook+2	Array Design+3
770. Basic Calculator IV	Solve	Hard	Adobe+1	Hash Table Math+3
815. Bus Routes	Solve	Hard	Amazon+7	Array Breadth-First Search+1
828. Count Unique Characters of All Substrings of a Given String	Solve	Hard	Amazon+3	Dynamic Programming Hash Table+1
839. Similar String Groups	Solve	Hard	Apple+1	Array Breadth-First Search+4
895. Maximum Frequency Stack	Solve	Hard	Adobe+7	Design Hash Table+2
924. Minimize Malware Spread	Solve	Hard	Adobe+3	Array Breadth-First Search+4
928. Minimize Malware Spread II	Solve	Hard	Dropbox+1	Array Breadth-First Search+4
952. Largest Component Size by Common Factor	Solve	Hard	Google	Array Hash Table+3
982. Triples with Bitwise AND Equal To Zero	Solve	Hard	Flipkart	Array Bit Manipulation+1
987. Vertical Order Traversal of a Binary Tree	Solve	Hard	Amazon+4	Binary Tree Breadth-First Search+4
992. Subarrays with K Different Integers	Solve	Hard	Adobe+10	Array Counting+2
996. Number of Squareful Arrays	Solve	Hard	Apple+1	Array Backtracking+5
1001. Grid Illumination	Solve	Hard	Dropbox	Array Hash Table
1036. Escape a Large Maze	Solve	Hard	Apple+2	Array Breadth-First Search+2
1074. Number of Submatrices That Sum to Target	Solve	Hard	Amazon+2	Array Hash Table+2
1153. String Transforms Into Another String	Solve	Hard	Amazon+4	Hash Table String
1172. Dinner Plate Stacks	Solve	Hard	-	Design Hash Table+2
1178. Number of Valid Words for Each Puzzle	Solve	Hard	Dropbox	Array Bit Manipulation+3
1224. Maximum Equal Frequency	Solve	Hard	American Express	Array Hash Table
1284. Minimum Number of Flips to Convert Binary Matrix to Zero Matrix	Solve	Hard	Airbnb+1	Array Bit Manipulation+3
1345. Jump Game IV	Solve	Hard	Amazon+2	Array Breadth-First Search+1
1542. Find Longest Awesome Substring	Solve	Hard	Directi	Bit Manipulation Hash Table+1
1713. Minimum Operations to Make a Subsequence	Solve	Hard	Google	Array Binary Search+2
1788. Maximize the Beauty of the Garden	Solve	Hard	Amazon	Array Greedy+2
1857. Largest Color Value in a Directed Graph	Solve	Hard	Accolite+3	Counting Dynamic Programming+4
1912. Design Movie Rental System	Solve	Hard	Flipkart	Array Design+3
1932. Merge BSTs to Create Single BST	Solve	Hard	-	Binary Search Binary Tree+3