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
1296. Divide Array in Sets of K Consecutive Numbers	Solve	Medium	Google	Array Greedy+2
1297. Maximum Number of Occurrences of a Substring	Solve	Medium	Amazon	Hash Table Sliding Window+1
1311. Get Watched Videos by Your Friends	Solve	Medium	Amazon	Array Breadth-First Search+3
1331. Rank Transform of an Array	Solve	Easy	Facebook+1	Array Hash Table+1
1338. Reduce Array Size to The Half	Solve	Medium	Amazon	Array Greedy+3
1345. Jump Game IV	Solve	Hard	Amazon+2	Array Breadth-First Search+1
1346. Check If N and Its Double Exist	Solve	Easy	Google	Array Binary Search+3
1347. Minimum Number of Steps to Make Two Strings Anagram	Solve	Medium	Bloomberg+5	Counting Hash Table+1
1348. Tweet Counts Per Frequency	Solve	Medium	Twitter	Binary Search Design+3
1357. Apply Discount Every n Orders	Solve	Medium	Facebook	Array Design+1
1358. Number of Substrings Containing All Three Characters	Solve	Medium	Adobe+2	Hash Table Sliding Window+1
1365. How Many Numbers Are Smaller Than the Current Number	Solve	Easy	Amazon+1	Array Counting+2
1366. Rank Teams by Votes	Solve	Medium	Atlassian+3	Array Counting+3
1370. Increasing Decreasing String	Solve	Easy	Akuna Capital+1	Counting Hash Table+1
1371. Find the Longest Substring Containing Vowels in Even Counts	Solve	Medium	Microsoft	Bit Manipulation Hash Table+2
1386. Cinema Seat Allocation	Solve	Medium	Amazon+1	Array Bit Manipulation+2
1394. Find Lucky Integer in an Array	Solve	Easy	Microsoft	Array Counting+1
1396. Design Underground System	Solve	Medium	Amazon+1	Design Hash Table+1
1399. Count Largest Group	Solve	Easy	Mercari	Hash Table Math
1400. Construct K Palindrome Strings	Solve	Medium	Uber	Counting Greedy+2
1410. HTML Entity Parser	Solve	Medium	Oracle	Hash Table String
1418. Display Table of Food Orders in a Restaurant	Solve	Medium	JP Morgan	Array Hash Table+3
1426. Counting Elements	Solve	Easy	DRW	Array Hash Table
1429. First Unique Number	Solve	Medium	Amazon+1	Array Data Stream+3
1436. Destination City	Solve	Easy	Google+1	Array Hash Table+1
1442. Count Triplets That Can Form Two Arrays of Equal XOR	Solve	Medium	-	Array Bit Manipulation+3
1443. Minimum Time to Collect All Apples in a Tree	Solve	Medium	Apple+2	Breadth-First Search Depth-First Search+2
1452. People Whose List of Favorite Companies Is Not a Subset of Another List	Solve	Medium	Google	Array Hash Table+1
1460. Make Two Arrays Equal by Reversing Subarrays	Solve	Easy	Facebook	Array Hash Table+1
1461. Check If a String Contains All Binary Codes of Size K	Solve	Medium	Google	Bit Manipulation Hash Function+3
1477. Find Two Non-overlapping Sub-arrays Each With Target Sum	Solve	Medium	Google	Array Binary Search+3
1481. Least Number of Unique Integers after K Removals	Solve	Medium	Amazon+3	Array Counting+3
1485. Clone Binary Tree With Random Pointer	Solve	Medium	Facebook	Binary Tree Breadth-First Search+3
1487. Making File Names Unique	Solve	Medium	Expedia+1	Array Hash Table+1
1488. Avoid Flood in The City	Solve	Medium	Amazon+3	Array Binary Search+3
1490. Clone N-ary Tree	Solve	Medium	Google	Breadth-First Search Depth-First Search+2
1496. Path Crossing	Solve	Easy	Google	Hash Table String
1497. Check If Array Pairs Are Divisible by k	Solve	Medium	Amazon+1	Array Counting+1
1500. Design a File Sharing System	Solve	Medium	Twitch	Data Stream Design+3
1506. Find Root of N-Ary Tree	Solve	Medium	Bloomberg+1	Bit Manipulation Depth-First Search+2
1512. Number of Good Pairs	Solve	Easy	Adobe+2	Array Counting+2
1519. Number of Nodes in the Sub-Tree With the Same Label	Solve	Medium	Apple+4	Breadth-First Search Counting+3
1525. Number of Good Ways to Split a String	Solve	Medium	Amazon	Bit Manipulation Dynamic Programming+2
1540. Can Convert String in K Moves	Solve	Medium	Infosys	Hash Table String
1542. Find Longest Awesome Substring	Solve	Hard	Directi	Bit Manipulation Hash Table+1
1546. Maximum Number of Non-Overlapping Subarrays With Sum Equals Target	Solve	Medium	Google+1	Array Greedy+2
1554. Strings Differ by One Character	Solve	Medium	Airbnb+1	Hash Function Hash Table+2
1562. Find Latest Group of Size M	Solve	Medium	Amazon+1	Array Binary Search+2
1570. Dot Product of Two Sparse Vectors	Solve	Medium	Amazon+4	Array Design+2
1577. Number of Ways Where Square of Number Is Equal to Product of Two Numbers	Solve	Medium	-	Array Hash Table+2