Problems

3,898+ problems · 938 Easy · 2039 Medium · 921 Hard

Active:HardPremium· 175 results

Title	Solution	Practice	Difficulty	Companies	Topics
1199. Minimum Time to Build Blocks	Solution	Solve	Hard	Google	Array Greedy+2
1216. Valid Palindrome III	Solution	Solve	Hard	Amazon+2	Dynamic Programming String
1225. Report Contiguous Dates	Solution	Solve	Hard	Amazon+1	Database
1231. Divide Chocolate	Solution	Solve	Hard	Google	Array Binary Search
1246. Palindrome Removal	Solution	Solve	Hard	Microsoft	Array Dynamic Programming
1259. Handshakes That Don't Cross	Solution	Solve	Hard	Amazon	Dynamic Programming Math
1274. Number of Ships in a Rectangle	Solution	Solve	Hard	Bloomberg	Array Divide and Conquer+1
1336. Number of Transactions per Visit	Solution	Solve	Hard	Machine Zone+1	Database
1369. Get the Second Most Recent Activity	Solution	Solve	Hard	Microsoft	Database
1384. Total Sales Amount by Year	Solution	Solve	Hard	-	Database
1412. Find the Quiet Students in All Exams	Solution	Solve	Hard	-	Database
1479. Sales by Day of the Week	Solution	Solve	Hard	Amazon	Database
1516. Move Sub-Tree of N-Ary Tree	Solution	Solve	Hard	Google	Depth-First Search Tree
1548. The Most Similar Path in a Graph	Solution	Solve	Hard	Google	Dynamic Programming Graph
1597. Build Binary Expression Tree From Infix Expression	Solution	Solve	Hard	Amazon	Binary Tree Stack+2
1635. Hopper Company Queries I	Solution	Solve	Hard	Uber	Database
1645. Hopper Company Queries II	Solution	Solve	Hard	Uber	Database
1651. Hopper Company Queries III	Solution	Solve	Hard	Uber	Database
1692. Count Ways to Distribute Candies	Solution	Solve	Hard	Google	Dynamic Programming
1714. Sum Of Special Evenly-Spaced Elements In Array	Solution	Solve	Hard	MakeMyTrip	Array Dynamic Programming
1724. Checking Existence of Edge Length Limited Paths II	Solution	Solve	Hard	Google+1	Graph Minimum Spanning Tree+1
1767. Find the Subtasks That Did Not Execute	Solution	Solve	Hard	Google	Database
1788. Maximize the Beauty of the Garden	Solution	Solve	Hard	Amazon	Array Greedy+2
1842. Next Palindrome Using Same Digits	Solution	Solve	Hard	Amazon	String Two Pointers
1892. Page Recommendations II	Solution	Solve	Hard	Meta	Database
1917. Leetcodify Friends Recommendations	Solution	Solve	Hard	Spotify	Database
1919. Leetcodify Similar Friends	Solution	Solve	Hard	Spotify	Database
1924. Erect the Fence II	Solution	Solve	Hard	Google	Array Geometry+1
1956. Minimum Time For K Virus Variants to Spread	Solution	Solve	Hard	-	Array Binary Search+3
1972. First and Last Call On the Same Day	Solution	Solve	Hard	Amazon	Database
2004. The Number of Seniors and Juniors to Join the Company	Solution	Solve	Hard	-	Database
2005. Subtree Removal Game with Fibonacci Tree	Solution	Solve	Hard	Sony	Binary Tree Dynamic Programming+3
2010. The Number of Seniors and Juniors to Join the Company II	Solution	Solve	Hard	-	Database
2118. Build the Equation	Solution	Solve	Hard	-	Database
2123. Minimum Operations to Remove Adjacent Ones in Matrix	Solution	Solve	Hard	Amazon	Array Graph+1
2143. Choose Numbers From Two Arrays in Range	Solution	Solve	Hard	Adobe	Array Dynamic Programming
2153. The Number of Passengers in Each Bus II	Solution	Solve	Hard	-	Database
2158. Amount of New Area Painted Each Day	Solution	Solve	Hard	Google+1	Array Ordered Set+1
2173. Longest Winning Streak	Solution	Solve	Hard	Amazon	Database
2199. Finding the Topic of Each Post	Solution	Solve	Hard	Meta	Database
2204. Distance to a Cycle in Undirected Graph	Solution	Solve	Hard	Microsoft+1	Breadth-First Search Depth-First Search+2
2247. Maximum Cost of Trip With K Highways	Solution	Solve	Hard	-	Bit Manipulation Bitmask+2
2252. Dynamic Pivoting of a Table	Solution	Solve	Hard	-	Database
2253. Dynamic Unpivoting of a Table	Solution	Solve	Hard	-	Database
2254. Design Video Sharing Platform	Solution	Solve	Hard	Google	Design Hash Table+2
2263. Make Array Non-decreasing or Non-increasing	Solution	Solve	Hard	Google+3	Dynamic Programming Greedy
2277. Closest Node to Path in Tree	Solution	Solve	Hard	Google	Array Breadth-First Search+2
2307. Check for Contradictions in Equations	Solution	Solve	Hard	Amazon+1	Array Depth-First Search+2
2313. Minimum Flips in Binary Tree to Get Result	Solution	Solve	Hard	Google	Binary Tree Depth-First Search+2
2355. Maximum Number of Books You Can Take	Solution	Solve	Hard	Amazon	Array Dynamic Programming+2