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
3149. Find the Minimum Cost Array Permutation	Solve	Hard	-	Array Bit Manipulation+2
3154. Find Number of Ways to Reach the K-th Stair	Solve	Hard	-	Bit Manipulation Combinatorics+3
3156. Employee Task Duration and Concurrent Tasks	Solve	Hard	-	Database
3161. Block Placement Queries	Solve	Hard	-	Array Binary Indexed Tree+2
3165. Maximum Sum of Subsequence With Non-adjacent Elements	Solve	Hard	-	Array Divide and Conquer+2
3171. Find Subarray With Bitwise OR Closest to K	Solve	Hard	-	Array Binary Search+2
3177. Find the Maximum Length of a Good Subsequence II	Solve	Hard	-	Array Dynamic Programming+1
3181. Maximum Total Reward Using Operations II	Solve	Hard	-	Array Bit Manipulation+1
3187. Peaks in Array	Solve	Hard	-	Array Binary Indexed Tree+1
3188. Find Top Scoring Students II	Solve	Hard	-	Database
3193. Count the Number of Inversions	Solve	Hard	-	Array Dynamic Programming
3197. Find the Minimum Area to Cover All Ones II	Solve	Hard	-	Array Enumeration+1
3203. Find Minimum Diameter After Merging Two Trees	Solve	Hard	-	Breadth-First Search Depth-First Search+2
3209. Number of Subarrays With AND Value of K	Solve	Hard	-	Array Binary Search+2
3213. Construct String with Minimum Cost	Solve	Hard	-	Array Dynamic Programming+2
3214. Year on Year Growth Rate	Solve	Hard	-	Database
3219. Minimum Cost for Cutting Cake II	Solve	Hard	-	Array Greedy+1
3225. Maximum Score From Grid Operations	Solve	Hard	-	Array Dynamic Programming+2
3229. Minimum Operations to Make Array Equal to Target	Solve	Hard	-	Array Dynamic Programming+3
3231. Minimum Number of Increasing Subsequence to Be Removed	Solve	Hard	-	Array Binary Search
3235. Check if the Rectangle Corner Is Reachable	Solve	Hard	-	Array Breadth-First Search+4
3236. CEO Subordinate Hierarchy	Solve	Hard	-	Database
3241. Time Taken to Mark All Nodes	Solve	Hard	-	Depth-First Search Dynamic Programming+2
3244. Shortest Distance After Road Addition Queries II	Solve	Hard	-	Array Graph+2
3245. Alternating Groups III	Solve	Hard	-	Array Binary Indexed Tree
3250. Find the Count of Monotonic Pairs I	Solve	Hard	-	Array Combinatorics+3
3251. Find the Count of Monotonic Pairs II	Solve	Hard	-	Array Combinatorics+3
3256. Maximum Value Sum by Placing Three Rooks I	Solve	Hard	-	Array Dynamic Programming+2
3257. Maximum Value Sum by Placing Three Rooks II	Solve	Hard	-	Array Dynamic Programming+2
3260. Find the Largest Palindrome Divisible by K	Solve	Hard	-	Dynamic Programming Greedy+3
3261. Count Substrings That Satisfy K-Constraint II	Solve	Hard	-	Array Binary Search+3
3266. Final Array State After K Multiplication Operations II	Solve	Hard	-	Array Heap (Priority Queue)+1
3267. Count Almost Equal Pairs II	Solve	Hard	-	Array Counting+3
3268. Find Overlapping Shifts II	Solve	Hard	-	Database
3269. Constructing Two Increasing Arrays	Solve	Hard	-	Array Dynamic Programming
3272. Find the Count of Good Integers	Solve	Hard	-	Combinatorics Enumeration+2
3273. Minimum Amount of Damage Dealt to Bob	Solve	Hard	-	Array Greedy+1
3276. Select Cells in Grid With Maximum Score	Solve	Hard	-	Array Bit Manipulation+3
3277. Maximum XOR Score Subarray Queries	Solve	Hard	-	Array Dynamic Programming
3279. Maximum Total Area Occupied by Pistons	Solve	Hard	-	Array Counting+4
3283. Maximum Number of Moves to Kill All Pawns	Solve	Hard	-	Array Bit Manipulation+4
3287. Find the Maximum Sequence Value of Array	Solve	Hard	-	Array Bit Manipulation+1
3288. Length of the Longest Increasing Path	Solve	Hard	-	Array Binary Search+1
3292. Minimum Number of Valid Strings to Form Target II	Solve	Hard	-	Array Binary Search+6
3298. Count Substrings That Can Be Rearranged to Contain a String II	Solve	Hard	-	Hash Table Sliding Window+1
3299. Sum of Consecutive Subsequences	Solve	Hard	-	Array Dynamic Programming+1
3303. Find the Occurrence of First Almost Equal Substring	Solve	Hard	-	String String Matching
3307. Find the K-th Character in String Game II	Solve	Hard	-	Bit Manipulation Math+1
3311. Construct 2D Grid Matching Graph Layout	Solve	Hard	-	Array Graph+2
3312. Sorted GCD Pair Queries	Solve	Hard	-	Array Binary Search+6