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Problems

125 problems

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Binary TreeArray1,212Hash Table473String437Math331Greedy330Dynamic Programming327Sorting302Depth-First Search208Binary Search189Breadth-First Search166Matrix163Tree158Prefix Sum155Two Pointers150Database137All topics

Medium · 125 results

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TitleSolutionAcceptDifficultyTopics
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
1973. Count Nodes Equal to Sum of DescendantsVideoPremium
Solution77.4%Medium
Binary Tree, Depth-First Search +1· 1 company
2049. Count Nodes With the Highest ScoreVideo
Solution52.6%Medium
Array, Binary Tree +2· 3 companies
2096. Step-By-Step Directions From a Binary Tree Node to AnotherVideo
Solution56.3%Medium
Binary Tree, Depth-First Search +2· 6 companies
2196. Create Binary Tree From DescriptionsVideo
Solution83.9%Medium
Array, Binary Tree +2· 7 companies
2265. Count Nodes Equal to Average of SubtreeVideo
Solution88.6%Medium
Binary Tree, Depth-First Search +1· 4 companies
2385. Amount of Time for Binary Tree to Be InfectedVideo
Solution65.8%Medium
Binary Tree, Breadth-First Search +3· 12 companies
2415. Reverse Odd Levels of Binary TreeVideo
Solution86.7%Medium
Binary Tree, Breadth-First Search +2· 3 companies
2445. Number of Nodes With Value OneVideoPremium
Solution66.3%Medium
Binary Tree, Breadth-First Search +2· 1 company
2471. Minimum Number of Operations to Sort a Binary Tree by LevelVideo
Solution74.2%Medium
Binary Tree, Breadth-First Search +1· 3 companies
2476. Closest Nodes Queries in a Binary Search TreeVideo
Solution44.9%Medium
Array, Binary Search +4· 1 company
2583. Kth Largest Sum in a Binary TreeVideo
Solution59.4%Medium
Binary Tree, Breadth-First Search +2· 5 companies
2641. Cousins in Binary Tree IIVideo
Solution75.8%Medium
Binary Tree, Breadth-First Search +3· 2 companies
2673. Make Costs of Paths Equal in a Binary TreeVideo
Solution57.2%Medium
Array, Binary Tree +3· 1 company
2764. Is Array a Preorder of Some ‌Binary TreeVideoPremium
Solution67.8%Medium
Binary Tree, Depth-First Search +2
2773. Height of Special Binary TreeVideoPremium
Solution75.2%Medium
Binary Tree, Breadth-First Search +2
3157. Find the Level of Tree with Minimum SumVideoPremium
Solution69.6%Medium
Binary Tree, Breadth-First Search +2· 1 company
3319. K-th Largest Perfect Subtree Size in Binary TreeVideo
Solution61.6%Medium
Binary Tree, Depth-First Search +2· 1 company
3831. Median of a Binary Search Tree LevelVideoPremium
Solution86.4%Medium
Binary Search Tree, Binary Tree +3
3997. Count Dominant Nodes in a Binary TreeVideo
Solution72.1%Medium
Binary Tree, Depth-First Search +1
Showing 101–125 of 125