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
2598. Smallest Missing Non-negative Integer After Operations	Solve	Medium	Atlassian+2	Array Greedy+2
2605. Form Smallest Number From Two Digit Arrays	Solve	Easy	-	Array Enumeration+1
2606. Find the Substring With Maximum Cost	Solve	Medium	Amazon	Array Dynamic Programming+2
2610. Convert an Array Into a 2D Array With Conditions	Solve	Medium	Amazon	Array Hash Table
2615. Sum of Distances	Solve	Medium	BNY Melon	Array Hash Table+1
2641. Cousins in Binary Tree II	Solve	Medium	Amazon	Binary Tree Breadth-First Search+3
2653. Sliding Subarray Beauty	Solve	Medium	-	Array Hash Table+1
2657. Find the Prefix Common Array of Two Arrays	Solve	Medium	Yandex	Array Bit Manipulation+1
2661. First Completely Painted Row or Column	Solve	Medium	Citadel	Array Hash Table+1
2670. Find the Distinct Difference Array	Solve	Easy	-	Array Hash Table
2671. Frequency Tracker	Solve	Medium	-	Design Hash Table
2682. Find the Losers of the Circular Game	Solve	Easy	-	Array Hash Table+1
2707. Extra Characters in a String	Solve	Medium	Amazon+2	Array Dynamic Programming+3
2711. Difference of Number of Distinct Values on Diagonals	Solve	Medium	-	Array Hash Table+1
2713. Maximum Strictly Increasing Cells in a Matrix	Solve	Hard	Amazon+1	Array Binary Search+6
2716. Minimize String Length	Solve	Easy	-	Hash Table String
2718. Sum of Matrix After Queries	Solve	Medium	Sprinklr	Array Hash Table
2729. Check if The Number is Fascinating	Solve	Easy	-	Hash Table Math
2732. Find a Good Subset of the Matrix	Solve	Hard	-	Array Bit Manipulation+2
2743. Count Substrings Without Repeating Character	Solve	Medium	-	Hash Table Sliding Window+1
2744. Find Maximum Number of String Pairs	Solve	Easy	-	Array Hash Table+2
2747. Count Zero Request Servers	Solve	Medium	Zomato	Array Hash Table+2
2748. Number of Beautiful Pairs	Solve	Easy	-	Array Counting+3
2763. Sum of Imbalance Numbers of All Subarrays	Solve	Hard	Adobe+1	Array Hash Table+1
2766. Relocate Marbles	Solve	Medium	Amazon	Array Hash Table+2
2767. Partition String Into Minimum Beautiful Substrings	Solve	Medium	-	Backtracking Dynamic Programming+2
2768. Number of Black Blocks	Solve	Medium	Square+1	Array Enumeration+1
2780. Minimum Index of a Valid Split	Solve	Medium	-	Array Hash Table+1
2781. Length of the Longest Valid Substring	Solve	Hard	Amazon	Array Hash Table+2
2784. Check if Array is Good	Solve	Easy	-	Array Hash Table+1
2799. Count Complete Subarrays in an Array	Solve	Medium	TikTok	Array Hash Table+1
2808. Minimum Seconds to Equalize a Circular Array	Solve	Medium	-	Array Hash Table
2813. Maximum Elegance of a K-Length Subsequence	Solve	Hard	-	Array Greedy+4
2815. Max Pair Sum in an Array	Solve	Easy	Microsoft	Array Hash Table
2830. Maximize the Profit as the Salesman	Solve	Medium	Amazon	Array Binary Search+3
2831. Find the Longest Equal Subarray	Solve	Medium	Meesho+1	Array Binary Search+2
2840. Check if Strings Can be Made Equal With Operations II	Solve	Medium	Citrix	Hash Table Sorting+1
2841. Maximum Sum of Almost Unique Subarray	Solve	Medium	Amazon	Array Hash Table+1
2842. Count K-Subsequences of a String With Maximum Beauty	Solve	Hard	Google	Combinatorics Greedy+3
2845. Count of Interesting Subarrays	Solve	Medium	-	Array Hash Table+1
2848. Points That Intersect With Cars	Solve	Easy	Uber	Array Hash Table+1
2852. Sum of Remoteness of All Cells	Solve	Medium	Media.Net	Array Breadth-First Search+4
2856. Minimum Array Length After Pair Removals	Solve	Medium	Snowflake	Array Binary Search+4
2857. Count Pairs of Points With Distance k	Solve	Medium	Google	Array Bit Manipulation+1
2869. Minimum Operations to Collect Elements	Solve	Easy	Deutsche Bank	Array Bit Manipulation+1
2870. Minimum Number of Operations to Make Array Empty	Solve	Medium	Amazon+1	Array Counting+2
2875. Minimum Size Subarray in Infinite Array	Solve	Medium	DE Shaw	Array Hash Table+2
2897. Apply Operations on Array to Maximize Sum of Squares	Solve	Hard	Sprinklr	Array Bit Manipulation+2
2898. Maximum Linear Stock Score	Solve	Medium	Amazon	Array Hash Table
2902. Count of Sub-Multisets With Bounded Sum	Solve	Hard	-	Array Dynamic Programming+2