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Problems

261 problems

Has videoPremium onlyReset
Array2,209String870Hash Table786Math682Dynamic Programming666Sorting504Greedy480Binary Search352Depth-First Search335Database303Bit Manipulation283Matrix278Tree261Breadth-First Search255Two Pointers249All topics

With video · 261 results

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TitleSolutionAcceptDifficultyTopics
872. Leaf-Similar TreesVideo
Solution70.0%Easy
Binary Tree, Depth-First Search +1· 5 companies
889. Construct Binary Tree from Preorder and Postorder TraversalVideo
Solution78.0%Medium
Array, Binary Tree +3· 6 companies
894. All Possible Full Binary TreesVideo
Solution82.8%Medium
Binary Tree, Dynamic Programming +3· 5 companies
897. Increasing Order Search TreeVideo
Solution79.1%Easy
Binary Search Tree, Binary Tree +3· 2 companies
919. Complete Binary Tree InserterVideo
Solution65.0%Medium
Binary Tree, Breadth-First Search +2· 3 companies
938. Range Sum of BSTVideo
Solution87.7%Easy
Binary Search Tree, Binary Tree +2· 6 companies
951. Flip Equivalent Binary TreesVideo
Solution69.8%Medium
Binary Tree, Depth-First Search +1· 4 companies
958. Check Completeness of a Binary TreeVideo
Solution59.6%Medium
Binary Tree, Breadth-First Search +1· 5 companies
965. Univalued Binary TreeVideo
Solution73.5%Easy
Binary Tree, Breadth-First Search +2· 3 companies
968. Binary Tree CamerasVideo
Solution48.3%Hard
Binary Tree, Depth-First Search +2· 14 companies
971. Flip Binary Tree To Match Preorder TraversalVideo
Solution51.9%Medium
Binary Tree, Depth-First Search +1
979. Distribute Coins in Binary TreeVideo
Solution77.2%Medium
Binary Tree, Depth-First Search +1· 8 companies
987. Vertical Order Traversal of a Binary TreeVideo
Solution54.6%Hard
Binary Tree, Breadth-First Search +4· 15 companies
988. Smallest String Starting From LeafVideo
Solution61.2%Medium
Backtracking, Binary Tree +3· 2 companies
993. Cousins in Binary TreeVideo
Solution59.8%Easy
Binary Tree, Breadth-First Search +2· 6 companies
998. Maximum Binary Tree IIVideo
Solution70.8%Medium
Binary Tree, Tree· 1 company
1008. Construct Binary Search Tree from Preorder TraversalVideo
Solution84.7%Medium
Array, Binary Search Tree +4· 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
1038. Binary Search Tree to Greater Sum TreeVideo
Solution88.3%Medium
Binary Search Tree, Binary Tree +2· 3 companies
1080. Insufficient Nodes in Root to Leaf PathsVideo
Solution55.6%Medium
Binary Tree, Depth-First Search +1· 1 company
1104. Path In Zigzag Labelled Binary TreeVideo
Solution75.9%Medium
Binary Tree, Math +1· 2 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
1214. Two Sum BSTsVideoPremium
Solution68.2%Medium
Binary Search, Binary Search Tree +5· 1 company
1245. Tree DiameterVideoPremium
Solution61.1%Medium
Breadth-First Search, Depth-First Search +3· 7 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
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
1315. Sum of Nodes with Even-Valued GrandparentVideo
Solution85.6%Medium
Binary Tree, Breadth-First Search +2· 4 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
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
Showing 101–150 of 261