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
2963. Count the Number of Good Partitions	Solve	Hard	Google	Array Combinatorics+2
2968. Apply Operations to Maximize Frequency Score	Solve	Hard	Deutsche Bank	Array Binary Search+3
2969. Minimum Number of Coins for Fruits II	Solve	Hard	-	Array Dynamic Programming+3
2972. Count the Number of Incremovable Subarrays II	Solve	Hard	Apple	Array Binary Search+1
2973. Find Number of Coins to Place in Tree Nodes	Solve	Hard	Amazon+1	Depth-First Search Dynamic Programming+3
2977. Minimum Cost to Convert String II	Solve	Hard	Atlassian	Array Dynamic Programming+4
2983. Palindrome Rearrangement Queries	Solve	Hard	-	Hash Table Prefix Sum+1
2991. Top Three Wineries	Solve	Hard	-	Database
2994. Friday Purchases II	Solve	Hard	-	Database
2995. Viewers Turned Streamers	Solve	Hard	-	Database
2999. Count the Number of Powerful Integers	Solve	Hard	-	Dynamic Programming Math+1
3003. Maximize the Number of Partitions After Operations	Solve	Hard	-	Bit Manipulation Bitmask+2
3008. Find Beautiful Indices in the Given Array II	Solve	Hard	-	Binary Search Hash Function+4
3009. Maximum Number of Intersections on the Chart	Solve	Hard	-	Array Binary Indexed Tree+2
3013. Divide an Array Into Subarrays With Minimum Cost II	Solve	Hard	-	Array Hash Table+2
3017. Count the Number of Houses at a Certain Distance II	Solve	Hard	-	Graph Prefix Sum
3018. Maximum Number of Removal Queries That Can Be Processed I	Solve	Hard	-	Array Dynamic Programming
3022. Minimize OR of Remaining Elements Using Operations	Solve	Hard	-	Array Bit Manipulation+1
3027. Find the Number of Ways to Place People II	Solve	Hard	-	Array Enumeration+3
3031. Minimum Time to Revert Word to Initial State II	Solve	Hard	-	Hash Function Rolling Hash+2
3036. Number of Subarrays That Match a Pattern II	Solve	Hard	-	Array Hash Function+2
3037. Find Pattern in Infinite Stream II	Solve	Hard	-	Array Hash Function+3
3041. Maximize Consecutive Elements in an Array After Modification	Solve	Hard	-	Array Dynamic Programming+1
3045. Count Prefix and Suffix Pairs II	Solve	Hard	-	Array Hash Function+4
3049. Earliest Second to Mark Indices II	Solve	Hard	-	Array Binary Search+2
3052. Maximize Items	Solve	Hard	-	Database
3057. Employees Project Allocation	Solve	Hard	-	Database
3060. User Activities within Time Bounds	Solve	Hard	-	Database
3061. Calculate Trapping Rain Water	Solve	Hard	-	Database
3068. Find the Maximum Sum of Node Values	Solve	Hard	-	Array Bit Manipulation+4
3072. Distribute Elements Into Two Arrays II	Solve	Hard	-	Array Binary Indexed Tree+2
3077. Maximum Strength of K Disjoint Subarrays	Solve	Hard	-	Array Dynamic Programming+1
3082. Find the Sum of the Power of All Subsequences	Solve	Hard	-	Array Dynamic Programming
3086. Minimum Moves to Pick K Ones	Solve	Hard	-	Array Greedy+2
3088. Make String Anti-palindrome	Solve	Hard	-	Counting Sort Greedy+2
3093. Longest Common Suffix Queries	Solve	Hard	-	Array String+1
3098. Find the Sum of Subsequence Powers	Solve	Hard	-	Array Dynamic Programming+1
3102. Minimize Manhattan Distances	Solve	Hard	-	Array Geometry+3
3103. Find Trending Hashtags II	Solve	Hard	-	Database
3104. Find Longest Self-Contained Substring	Solve	Hard	-	Binary Search Hash Table+2
3108. Minimum Cost Walk in Weighted Graph	Solve	Hard	-	Array Bit Manipulation+2
3113. Find the Number of Subarrays Where Boundary Elements Are Maximum	Solve	Hard	-	Array Binary Search+2
3116. Kth Smallest Amount With Single Denomination Combination	Solve	Hard	-	Array Binary Search+4
3117. Minimum Sum of Values by Dividing Array	Solve	Hard	-	Array Binary Search+4
3123. Find Edges in Shortest Paths	Solve	Hard	-	Breadth-First Search Depth-First Search+3
3130. Find All Possible Stable Binary Arrays II	Solve	Hard	-	Dynamic Programming Prefix Sum
3134. Find the Median of the Uniqueness Array	Solve	Hard	-	Array Binary Search+2
3139. Minimum Cost to Equalize Array	Solve	Hard	-	Array Enumeration+1
3141. Maximum Hamming Distances	Solve	Hard	-	Array Bit Manipulation+1
3145. Find Products of Elements of Big Array	Solve	Hard	-	Array Binary Search+1