Skip to content

For employers Sign in

Make and follow sheets.Sign in

Problems

335 problems

Has video Premium only Reset

Array2,209 String870 Hash Table786 Math682 Dynamic Programming666 Sorting504 Greedy480 Binary Search352 Depth-First Search335 Database303 Bit Manipulation283 Matrix278 Tree261 Breadth-First Search255 Two Pointers249 All topics

With video · 335 results

Sign in to see which of these you have solved.Sign in

TitleSolutionAcceptDifficultyTopics

993. Cousins in Binary TreeVideo

Solution59.8%Easy

Binary Tree, Breadth-First Search +2· 6 companies

1020. Number of EnclavesVideo

Solution72.2%Medium

Array, Breadth-First Search +3· 5 companies

1022. Sum of Root To Leaf Binary NumbersVideo

Solution76.6%Easy

Binary Tree, Depth-First Search +1· 6 companies

1026. Maximum Difference Between Node and AncestorVideo

Solution78.1%Medium

Binary Tree, Depth-First Search +1· 5 companies

1028. Recover a Tree From Preorder TraversalVideo

Solution83.2%Hard

Binary Tree, Depth-First Search +2· 6 companies

1034. Coloring A BorderVideo

Solution51.8%Medium

Array, Breadth-First Search +2· 3 companies

1036. Escape a Large MazeVideo

Solution37.0%Hard

Array, Breadth-First Search +2· 4 companies

1038. Binary Search Tree to Greater Sum TreeVideo

Solution88.3%Medium

Binary Search Tree, Binary Tree +2· 3 companies

1042. Flower Planting With No AdjacentVideo

Solution54.1%Medium

Breadth-First Search, Depth-First Search +1· 2 companies

1080. Insufficient Nodes in Root to Leaf PathsVideo

Solution55.6%Medium

Binary Tree, Depth-First Search +1· 1 company

1102. Path With Maximum Minimum ValueVideoPremium

Solution54.6%Medium

Array, Binary Search +5· 3 companies

1110. Delete Nodes And Return ForestVideo

Solution72.4%Medium

Array, Binary Tree +3· 4 companies

1120. Maximum Average SubtreeVideoPremium

Solution66.7%Medium

Binary Tree, Depth-First Search +1· 1 company

1123. Lowest Common Ancestor of Deepest LeavesVideo

Solution79.5%Medium

Binary Tree, Breadth-First Search +3· 4 companies

1145. Binary Tree Coloring GameVideo

Solution52.9%Medium

Binary Tree, Depth-First Search +1· 2 companies

1161. Maximum Level Sum of a Binary TreeVideo

Solution70.0%Medium

Binary Tree, Breadth-First Search +2· 4 companies

1192. Critical Connections in a NetworkVideo

Solution60.6%Hard

Biconnected Component, Depth-First Search +1· 8 companies

1202. Smallest String With SwapsVideo

Solution61.0%Medium

Array, Breadth-First Search +5· 8 companies

1203. Sort Items by Groups Respecting DependenciesVideo

Solution66.0%Hard

Breadth-First Search, Depth-First Search +2· 5 companies

1214. Two Sum BSTsVideoPremium

Solution68.2%Medium

Binary Search, Binary Search Tree +5· 1 company

1233. Remove Sub-Folders from the FilesystemVideo

Solution78.6%Medium

Array, Depth-First Search +2· 8 companies

1236. Web CrawlerVideoPremium

Solution68.8%Medium

Breadth-First Search, Depth-First Search +2· 7 companies

1242. Web Crawler MultithreadedVideoPremium

–49.5%Medium

Breadth-First Search, Concurrency +1· 9 companies

1245. Tree DiameterVideoPremium

Solution61.1%Medium

Breadth-First Search, Depth-First Search +3· 7 companies

1254. Number of Closed IslandsVideo

Solution67.7%Medium

Array, Breadth-First Search +3· 5 companies

1257. Smallest Common RegionVideoPremium

Solution68.6%Medium

Array, Breadth-First Search +4· 1 company

1261. Find Elements in a Contaminated Binary TreeVideo

Solution84.1%Medium

Binary Tree, Breadth-First Search +4· 2 companies

1267. Count Servers that CommunicateVideo

Solution73.5%Medium

Array, Breadth-First Search +4· 6 companies

1273. Delete Tree NodesVideoPremium

Solution61.2%Medium

Array, Breadth-First Search +2· 1 company

1302. Deepest Leaves SumVideo

Solution86.3%Medium

Binary Tree, Breadth-First Search +2· 3 companies

1305. All Elements in Two Binary Search TreesVideo

Solution80.5%Medium

Binary Search Tree, Binary Tree +3· 2 companies

1306. Jump Game IIIVideo

Solution70.1%Medium

Array, Breadth-First Search +1· 3 companies

1315. Sum of Nodes with Even-Valued GrandparentVideo

Solution85.6%Medium

Binary Tree, Breadth-First Search +2· 4 companies

1319. Number of Operations to Make Network ConnectedVideo

Solution67.0%Medium

Breadth-First Search, Depth-First Search +2· 10 companies

1325. Delete Leaves With a Given ValueVideo

Solution77.4%Medium

Binary Tree, Depth-First Search +1· 4 companies

1339. Maximum Product of Splitted Binary TreeVideo

Solution55.7%Medium

Binary Tree, Depth-First Search +1· 5 companies

1361. Validate Binary Tree NodesVideo

Solution44.3%Medium

Binary Tree, Breadth-First Search +4· 3 companies

1367. Linked List in Binary TreeVideo

Solution52.1%Medium

Binary Tree, Depth-First Search +2· 5 companies

1372. Longest ZigZag Path in a Binary TreeVideo

Solution67.0%Medium

Binary Tree, Depth-First Search +2· 2 companies

1373. Maximum Sum BST in Binary TreeVideo

Solution48.9%Hard

Binary Search Tree, Binary Tree +3· 5 companies

1376. Time Needed to Inform All EmployeesVideo

Solution60.6%Medium

Breadth-First Search, Depth-First Search +1· 5 companies

1377. Frog Position After T SecondsVideo

Solution38.8%Hard

Breadth-First Search, Depth-First Search +2· 2 companies

1379. Find a Corresponding Node of a Binary Tree in a Clone of That TreeVideo

Solution85.9%Easy

Binary Tree, Breadth-First Search +2· 1 company

1382. Balance a Binary Search TreeVideo

Solution86.3%Medium

Binary Search Tree, Binary Tree +4· 5 companies

1391. Check if There is a Valid Path in a GridVideo

Solution64.5%Medium

Array, Breadth-First Search +3· 3 companies

1430. Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary TreeVideoPremium

Solution47.6%Medium

Binary Tree, Breadth-First Search +2

1443. Minimum Time to Collect All Apples in a TreeVideo

Solution63.6%Medium

Breadth-First Search, Depth-First Search +2· 4 companies

1448. Count Good Nodes in Binary TreeVideo

Solution73.8%Medium

Binary Tree, Breadth-First Search +2· 7 companies

1457. Pseudo-Palindromic Paths in a Binary TreeVideo

Solution68.3%Medium

Binary Tree, Bit Manipulation +3· 2 companies

1462. Course Schedule IVVideo

Solution60.4%Medium

Breadth-First Search, Depth-First Search +2· 6 companies

Showing 151–200 of 335