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178 problems

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Binary Tree 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 · 178 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 178