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
3140. Consecutive Available Seats II	Solve	Medium	-	Database
3143. Maximum Points Inside the Square	Solve	Medium	-	Array Binary Search+3
3144. Minimum Substring Partition of Equal Character Frequency	Solve	Medium	-	Counting Dynamic Programming+2
3147. Taking Maximum Energy From the Mystic Dungeon	Solve	Medium	-	Array Prefix Sum
3148. Maximum Difference Score in a Grid	Solve	Medium	-	Array Dynamic Programming+1
3152. Special Array II	Solve	Medium	-	Array Binary Search+1
3153. Sum of Digit Differences of All Pairs	Solve	Medium	-	Array Counting+2
3155. Maximum Number of Upgradable Servers	Solve	Medium	-	Array Binary Search+1
3157. Find the Level of Tree with Minimum Sum	Solve	Medium	-	Binary Tree Breadth-First Search+2
3159. Find Occurrences of an Element in an Array	Solve	Medium	-	Array Hash Table
3160. Find the Number of Distinct Colors Among the Balls	Solve	Medium	-	Array Hash Table+1
3163. String Compression III	Solve	Medium	-	String
3164. Find the Number of Good Pairs II	Solve	Medium	-	Array Hash Table
3166. Calculate Parking Fees and Duration	Solve	Medium	-	Database
3167. Better Compression of String	Solve	Medium	-	Counting Hash Table+2
3169. Count Days Without Meetings	Solve	Medium	-	Array Sorting
3170. Lexicographically Minimum String After Removing Stars	Solve	Medium	-	Greedy Hash Table+3
3175. Find The First Player to win K Games in a Row	Solve	Medium	-	Array Simulation
3176. Find the Maximum Length of a Good Subsequence I	Solve	Medium	-	Array Dynamic Programming+1
3179. Find the N-th Value After K Seconds	Solve	Medium	-	Array Combinatorics+3
3180. Maximum Total Reward Using Operations I	Solve	Medium	-	Array Dynamic Programming
3182. Find Top Scoring Students	Solve	Medium	-	Database
3183. The Number of Ways to Make the Sum	Solve	Medium	-	Array Dynamic Programming
3185. Count Pairs That Form a Complete Day II	Solve	Medium	-	Array Counting+1
3186. Maximum Total Damage With Spell Casting	Solve	Medium	-	Array Binary Search+5
3189. Minimum Moves to Get a Peaceful Board	Solve	Medium	-	Array Counting Sort+2
3191. Minimum Operations to Make Binary Array Elements Equal to One I	Solve	Medium	-	Array Bit Manipulation+3
3192. Minimum Operations to Make Binary Array Elements Equal to One II	Solve	Medium	-	Array Dynamic Programming+1
3195. Find the Minimum Area to Cover All Ones I	Solve	Medium	-	Array Matrix
3196. Maximize Total Cost of Alternating Subarrays	Solve	Medium	-	Array Dynamic Programming
3201. Find the Maximum Length of Valid Subsequence I	Solve	Medium	-	Array Dynamic Programming
3202. Find the Maximum Length of Valid Subsequence II	Solve	Medium	-	Array Dynamic Programming
3204. Bitwise User Permissions Analysis	Solve	Medium	-	Database
3205. Maximum Array Hopping Score I	Solve	Medium	-	Array Dynamic Programming+3
3207. Maximum Points After Enemy Battles	Solve	Medium	-	Array Greedy
3208. Alternating Groups II	Solve	Medium	-	Array Sliding Window
3211. Generate Binary Strings Without Adjacent Zeros	Solve	Medium	-	Backtracking Bit Manipulation+1
3212. Count Submatrices With Equal Frequency of X and Y	Solve	Medium	-	Array Matrix+1
3215. Count Triplets with Even XOR Set Bits II	Solve	Medium	-	Array Bit Manipulation
3217. Delete Nodes From Linked List Present in Array	Solve	Medium	-	Array Hash Table+1
3218. Minimum Cost for Cutting Cake I	Solve	Medium	-	Array Dynamic Programming+2
3220. Odd and Even Transactions	Solve	Medium	-	Database
3221. Maximum Array Hopping Score II	Solve	Medium	-	Array Greedy+2
3223. Minimum Length of String After Operations	Solve	Medium	-	Counting Hash Table+1
3224. Minimum Array Changes to Make Differences Equal	Solve	Medium	-	Array Hash Table+1
3227. Vowels Game in a String	Solve	Medium	-	Brainteaser Game Theory+2
3228. Maximum Number of Operations to Move Ones to the End	Solve	Medium	-	Counting Greedy+1
3230. Customer Purchasing Behavior Analysis	Solve	Medium	-	Database
3233. Find the Count of Numbers Which Are Not Special	Solve	Medium	-	Array Math+1
3234. Count the Number of Substrings With Dominant Ones	Solve	Medium	-	Enumeration Sliding Window+1