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
3051. Find Candidates for Data Scientist Position	Solve	Easy	-	Database
3052. Maximize Items	Solve	Hard	-	Database
3053. Classifying Triangles by Lengths	Solve	Easy	-	Database
3054. Binary Tree Nodes	Solve	Medium	-	Database
3055. Top Percentile Fraud	Solve	Medium	-	Database
3056. Snaps Analysis	Solve	Medium	-	Database
3057. Employees Project Allocation	Solve	Hard	-	Database
3058. Friends With No Mutual Friends	Solve	Medium	-	Database
3059. Find All Unique Email Domains	Solve	Easy	-	Database
3060. User Activities within Time Bounds	Solve	Hard	-	Database
3061. Calculate Trapping Rain Water	Solve	Hard	-	Database
3062. Winner of the Linked List Game	Solve	Easy	-	Linked List
3063. Linked List Frequency	Solve	Easy	-	Counting Hash Table+1
3064. Guess the Number Using Bitwise Questions I	Solve	Medium	-	Bit Manipulation Interactive
3065. Minimum Operations to Exceed Threshold Value I	Solve	Easy	-	Array
3066. Minimum Operations to Exceed Threshold Value II	Solve	Medium	-	Array Heap (Priority Queue)+1
3067. Count Pairs of Connectable Servers in a Weighted Tree Network	Solve	Medium	-	Array Depth-First Search+1
3068. Find the Maximum Sum of Node Values	Solve	Hard	-	Array Bit Manipulation+4
3069. Distribute Elements Into Two Arrays I	Solve	Easy	-	Array Simulation
3070. Count Submatrices with Top-Left Element and Sum Less Than k	Solve	Medium	-	Array Matrix+1
3071. Minimum Operations to Write the Letter Y on a Grid	Solve	Medium	-	Array Counting+2
3072. Distribute Elements Into Two Arrays II	Solve	Hard	-	Array Binary Indexed Tree+2
3073. Maximum Increasing Triplet Value	Solve	Medium	-	Array Ordered Set
3074. Apple Redistribution into Boxes	Solve	Easy	-	Array Greedy+1
3075. Maximize Happiness of Selected Children	Solve	Medium	-	Array Greedy+1
3076. Shortest Uncommon Substring in an Array	Solve	Medium	-	Array Hash Table+2
3077. Maximum Strength of K Disjoint Subarrays	Solve	Hard	-	Array Dynamic Programming+1
3078. Match Alphanumerical Pattern in Matrix I	Solve	Medium	-	Array Hash Table+2
3079. Find the Sum of Encrypted Integers	Solve	Easy	-	Array Math
3080. Mark Elements on Array by Performing Queries	Solve	Medium	-	Array Hash Table+3
3081. Replace Question Marks in String to Minimize Its Value	Solve	Medium	-	Counting Greedy+4
3082. Find the Sum of the Power of All Subsequences	Solve	Hard	-	Array Dynamic Programming
3083. Existence of a Substring in a String and Its Reverse	Solve	Easy	-	Hash Table String
3084. Count Substrings Starting and Ending with Given Character	Solve	Medium	-	Counting Math+1
3085. Minimum Deletions to Make String K-Special	Solve	Medium	-	Counting Greedy+3
3086. Minimum Moves to Pick K Ones	Solve	Hard	-	Array Greedy+2
3087. Find Trending Hashtags	Solve	Medium	-	Database
3088. Make String Anti-palindrome	Solve	Hard	-	Counting Sort Greedy+2
3089. Find Bursty Behavior	Solve	Medium	-	Database
3090. Maximum Length Substring With Two Occurrences	Solve	Easy	-	Hash Table Sliding Window+1
3091. Apply Operations to Make Sum of Array Greater Than or Equal to k	Solve	Medium	-	Enumeration Greedy+1
3092. Most Frequent IDs	Solve	Medium	-	Array Hash Table+2
3093. Longest Common Suffix Queries	Solve	Hard	-	Array String+1
3094. Guess the Number Using Bitwise Questions II	Solve	Medium	-	Bit Manipulation Interactive
3095. Shortest Subarray With OR at Least K I	Solve	Easy	-	Array Bit Manipulation+1
3096. Minimum Levels to Gain More Points	Solve	Medium	-	Array Prefix Sum
3097. Shortest Subarray With OR at Least K II	Solve	Medium	-	Array Bit Manipulation+1
3098. Find the Sum of Subsequence Powers	Solve	Hard	-	Array Dynamic Programming+1
3099. Harshad Number	Solve	Easy	-	Math
3100. Water Bottles II	Solve	Medium	-	Math Simulation