Dashboard Questions Topics Companies Sheets

Data Structures & Algorithms

Practice 3,374+ coding problems from top companies. Master DSA concepts and ace your interviews.

3,374

Problems

840

Easy

1762

Medium

772

Hard

Difficulty

All3374 Easy840 Medium1762 Hard772

Title	Solve	Difficulty	Companies	Topics
2751. Robot Collisions	Solve	Hard	Deutsche Bank+1	Array Simulation+2
2752. Customers with Maximum Number of Transactions on Consecutive Days	Solve	Hard	-	Database
2753. Count Houses in a Circular Street II	Solve	Hard	-
2754. Bind Function to Context	Solve	Medium	-
2755. Deep Merge of Two Objects	Solve	Medium	-
2756. Query Batching	Solve	Hard	-
2757. Generate Circular Array Values	Solve	Medium	-
2758. Next Day	Solve	Easy	-
2759. Convert JSON String to Object	Solve	Hard	-
2760. Longest Even Odd Subarray With Threshold	Solve	Easy	-	Array Sliding Window
2761. Prime Pairs With Target Sum	Solve	Medium	-	Array Enumeration+2
2762. Continuous Subarrays	Solve	Medium	Adobe+3	Array Heap (Priority Queue)+4
2763. Sum of Imbalance Numbers of All Subarrays	Solve	Hard	Adobe+1	Array Hash Table+1
2764. Is Array a Preorder of Some ‌Binary Tree	Solve	Medium	-	Binary Tree Depth-First Search+2
2765. Longest Alternating Subarray	Solve	Easy	-	Array Enumeration
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
2769. Find the Maximum Achievable Number	Solve	Easy	Amazon	Math
2770. Maximum Number of Jumps to Reach the Last Index	Solve	Medium	-	Array Dynamic Programming
2771. Longest Non-decreasing Subarray From Two Arrays	Solve	Medium	Citadel+1	Array Dynamic Programming
2772. Apply Operations to Make All Array Elements Equal to Zero	Solve	Medium	Hudson River Trading	Array Prefix Sum
2773. Height of Special Binary Tree	Solve	Medium	-	Binary Tree Breadth-First Search+2
2774. Array Upper Bound	Solve	Easy	-
2775. Undefined to Null	Solve	Medium	-
2776. Convert Callback Based Function to Promise Based Function	Solve	Medium	-
2777. Date Range Generator	Solve	Medium	-
2778. Sum of Squares of Special Elements	Solve	Easy	-	Array Enumeration
2779. Maximum Beauty of an Array After Applying Operation	Solve	Medium	Google	Array Binary Search+2
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
2782. Number of Unique Categories	Solve	Medium	Amazon	Counting Interactive+1
2783. Flight Occupancy and Waitlist Analysis	Solve	Medium	-	Database
2784. Check if Array is Good	Solve	Easy	-	Array Hash Table+1
2785. Sort Vowels in a String	Solve	Medium	Google+1	Sorting String
2786. Visit Array Positions to Maximize Score	Solve	Medium	-	Array Dynamic Programming
2787. Ways to Express an Integer as Sum of Powers	Solve	Medium	-	Dynamic Programming
2788. Split Strings by Separator	Solve	Easy	-	Array String
2789. Largest Element in an Array after Merge Operations	Solve	Medium	-	Array Greedy
2790. Maximum Number of Groups With Increasing Length	Solve	Hard	-	Array Binary Search+3
2791. Count Paths That Can Form a Palindrome in a Tree	Solve	Hard	-	Bit Manipulation Bitmask+3
2792. Count Nodes That Are Great Enough	Solve	Hard	-	Binary Tree Depth-First Search+2
2793. Status of Flight Tickets	Solve	Hard	-
2794. Create Object from Two Arrays	Solve	Easy	-
2795. Parallel Execution of Promises for Individual Results Retrieval	Solve	Medium	-
2796. Repeat String	Solve	Easy	-
2797. Partial Function with Placeholders	Solve	Easy	-
2798. Number of Employees Who Met the Target	Solve	Easy	Adobe+1	Array
2799. Count Complete Subarrays in an Array	Solve	Medium	TikTok	Array Hash Table+1
2800. Shortest String That Contains Three Strings	Solve	Medium	DE Shaw	Enumeration Greedy+1