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
1151. Minimum Swaps to Group All 1's Together	Solve	Medium	Amazon	Array Sliding Window
1152. Analyze User Website Visit Pattern	Solve	Medium	Amazon+1	Array Hash Table+1
1153. String Transforms Into Another String	Solve	Hard	Amazon+4	Hash Table String
1154. Day of the Year	Solve	Easy	ZScaler	Math String
1155. Number of Dice Rolls With Target Sum	Solve	Medium	Accolite+14	Dynamic Programming
1156. Swap For Longest Repeated Character Substring	Solve	Medium	Microsoft+1	Hash Table Sliding Window+1
1157. Online Majority Element In Subarray	Solve	Hard	Nutanix	Array Binary Indexed Tree+3
1158. Market Analysis I	Solve	Medium	Poshmark	Database
1159. Market Analysis II	Solve	Hard	Poshmark	Database
1160. Find Words That Can Be Formed by Characters	Solve	Easy	Amazon+3	Array Counting+2
1161. Maximum Level Sum of a Binary Tree	Solve	Medium	Adobe+12	Binary Tree Breadth-First Search+2
1162. As Far from Land as Possible	Solve	Medium	Amazon+4	Array Breadth-First Search+2
1163. Last Substring in Lexicographical Order	Solve	Hard	Mathworks	String Two Pointers
1164. Product Price at a Given Date	Solve	Medium	Amazon+2	Database
1165. Single-Row Keyboard	Solve	Easy	Google	Hash Table String
1166. Design File System	Solve	Medium	Google	Design Hash Table+2
1167. Minimum Cost to Connect Sticks	Solve	Medium	Airbnb+5	Array Greedy+1
1168. Optimize Water Distribution in a Village	Solve	Hard	Google	Graph Heap (Priority Queue)+2
1169. Invalid Transactions	Solve	Medium	Amazon+2	Array Hash Table+2
1170. Compare Strings by Frequency of the Smallest Character	Solve	Medium	Google	Array Binary Search+3
1171. Remove Zero Sum Consecutive Nodes from Linked List	Solve	Medium	Amazon	Hash Table Linked List
1172. Dinner Plate Stacks	Solve	Hard	-	Design Hash Table+2
1173. Immediate Food Delivery I	Solve	Easy	DoorDash	Database
1174. Immediate Food Delivery II	Solve	Medium	Apple+1	Database
1175. Prime Arrangements	Solve	Easy	Amazon	Math
1176. Diet Plan Performance	Solve	Easy	Amazon	Array Sliding Window
1177. Can Make Palindrome from Substring	Solve	Medium	Akuna Capital	Array Bit Manipulation+3
1178. Number of Valid Words for Each Puzzle	Solve	Hard	Dropbox	Array Bit Manipulation+3
1179. Reformat Department Table	Solve	Easy	Amazon	Database
1180. Count Substrings with Only One Distinct Letter	Solve	Easy	Virtu Financial	Math String
1181. Before and After Puzzle	Solve	Medium	Clutter	Array Hash Table+2
1182. Shortest Distance to Target Color	Solve	Medium	Uber	Array Binary Search+1
1183. Maximum Number of Ones	Solve	Hard	Qualcomm	Greedy Heap (Priority Queue)
1184. Distance Between Bus Stops	Solve	Easy	Google	Array
1185. Day of the Week	Solve	Easy	Apple+1	Math
1186. Maximum Subarray Sum with One Deletion	Solve	Medium	Amazon+2	Array Dynamic Programming
1187. Make Array Strictly Increasing	Solve	Hard	-	Array Binary Search+2
1188. Design Bounded Blocking Queue	Solve	Medium	Adobe+8	Concurrency
1189. Maximum Number of Balloons	Solve	Easy	Adobe	Counting Hash Table+1
1190. Reverse Substrings Between Each Pair of Parentheses	Solve	Medium	Microsoft+1	Stack String
1191. K-Concatenation Maximum Sum	Solve	Medium	Adobe+1	Array Dynamic Programming
1192. Critical Connections in a Network	Solve	Hard	Adobe+4	Biconnected Component Depth-First Search+1
1193. Monthly Transactions I	Solve	Medium	Adobe+2	Database
1194. Tournament Winners	Solve	Hard	Wayfair	Database
1195. Fizz Buzz Multithreaded	Solve	Medium	-	Concurrency
1196. How Many Apples Can You Put into the Basket	Solve	Easy	Virtu Financial	Array Greedy+1
1197. Minimum Knight Moves	Solve	Medium	Amazon+10	Breadth-First Search
1198. Find Smallest Common Element in All Rows	Solve	Medium	Walmart Global Tech	Array Binary Search+3
1199. Minimum Time to Build Blocks	Solve	Hard	Google	Array Greedy+2
1200. Minimum Absolute Difference	Solve	Easy	Google+2	Array Sorting