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Problems

179 problems

Has videoPremium onlyReset
Binary TreeArray2,237String877Hash Table797Math691Dynamic Programming673Sorting508Greedy485Binary Search357Depth-First Search338Database308Bit Manipulation286Matrix279Tree264Breadth-First Search257Prefix Sum252All topics

179 results

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TitleSolutionAcceptDifficultyTopics
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
1261. Find Elements in a Contaminated Binary TreeVideo
Solution84.1%Medium
Binary Tree, Breadth-First Search +4· 2 companies
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
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
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
1469. Find All The Lonely NodesVideoPremium
Solution83.8%Easy
Binary Tree, Breadth-First Search +2· 1 company
1485. Clone Binary Tree With Random PointerVideoPremium
Solution81.2%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1530. Number of Good Leaf Nodes PairsVideo
Solution71.9%Medium
Binary Tree, Depth-First Search +1· 3 companies
1569. Number of Ways to Reorder Array to Get Same BSTVideo
Solution65.8%Hard
Array, Binary Search Tree +8· 2 companies
1586. Binary Search Tree Iterator IIVideoPremium
Solution63.4%Medium
Binary Search Tree, Binary Tree +4· 1 company
1597. Build Binary Expression Tree From Infix ExpressionVideoPremium
–62.5%Hard
Binary Tree, Stack +2· 1 company
1602. Find Nearest Right Node in Binary TreeVideoPremium
Solution75.2%Medium
Binary Tree, Breadth-First Search +1· 1 company
1609. Even Odd TreeVideo
Solution67.1%Medium
Binary Tree, Breadth-First Search +1· 3 companies
1612. Check If Two Expression Trees are EquivalentVideoPremium
Solution71.8%Medium
Binary Tree, Counting +3· 1 company
1628. Design an Expression Tree With Evaluate FunctionVideoPremium
Solution82.4%Medium
Array, Binary Tree +4· 1 company
1644. Lowest Common Ancestor of a Binary Tree IIVideoPremium
Solution69.6%Medium
Binary Tree, Depth-First Search +1· 4 companies
1650. Lowest Common Ancestor of a Binary Tree IIIVideoPremium
Solution83.0%Medium
Binary Tree, Hash Table +2· 10 companies
1660. Correct a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 1 company
1666. Change the Root of a Binary TreeVideoPremium
Solution74.4%Medium
Binary Tree, Depth-First Search +1· 1 company
1676. Lowest Common Ancestor of a Binary Tree IVVideoPremium
Solution79.6%Medium
Binary Tree, Depth-First Search +2· 4 companies
1740. Find Distance in a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1902. Depth of BST Given Insertion OrderVideoPremium
Solution42.5%Medium
Array, Binary Search Tree +3
Showing 101–150 of 179