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Problems

338 problems

Has videoPremium onlyReset
Array2,237String877Hash Table797Math691Dynamic Programming673Sorting508Greedy485Binary Search357Depth-First Search338Database308Bit Manipulation286Matrix279Tree264Breadth-First Search257Prefix Sum252All topics

338 results

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TitleSolutionAcceptDifficultyTopics
1466. Reorder Routes to Make All Paths Lead to the City ZeroVideo
Solution65.7%Medium
Breadth-First Search, Depth-First Search +1· 5 companies
1469. Find All The Lonely NodesVideoPremium
Solution83.8%Easy
Binary Tree, Breadth-First Search +2· 1 company
1483. Kth Ancestor of a Tree NodeVideo
Solution39.7%Hard
Binary Search, Breadth-First Search +4· 3 companies
1485. Clone Binary Tree With Random PointerVideoPremium
Solution81.2%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1490. Clone N-ary TreeVideoPremium
Solution83.2%Medium
Breadth-First Search, Depth-First Search +2· 1 company
1506. Find Root of N-Ary TreeVideoPremium
Solution78.4%Medium
Bit Manipulation, Depth-First Search +2· 3 companies
1516. Move Sub-Tree of N-Ary TreeVideoPremium
–59.7%Hard
Depth-First Search, Tree· 1 company
1519. Number of Nodes in the Sub-Tree With the Same LabelVideo
Solution55.5%Medium
Breadth-First Search, Counting +3· 2 companies
1522. Diameter of N-Ary TreeVideoPremium
Solution75.4%Medium
Depth-First Search, Tree· 3 companies
1530. Number of Good Leaf Nodes PairsVideo
Solution71.9%Medium
Binary Tree, Depth-First Search +1· 3 companies
1559. Detect Cycles in 2D GridVideo
Solution63.2%Medium
Array, Breadth-First Search +3· 6 companies
1568. Minimum Number of Days to Disconnect IslandVideo
Solution58.8%Hard
Array, Breadth-First Search +3· 4 companies
1600. Throne InheritanceVideo
Solution68.2%Medium
Depth-First Search, Design +2· 2 companies
1612. Check If Two Expression Trees are EquivalentVideoPremium
Solution71.8%Medium
Binary Tree, Counting +3· 1 company
1625. Lexicographically Smallest String After Applying OperationsVideo
Solution79.4%Medium
Breadth-First Search, Depth-First Search +2· 2 companies
1631. Path With Minimum EffortVideo
Solution64.1%Medium
Array, Binary Search +5· 9 companies
1644. Lowest Common Ancestor of a Binary Tree IIVideoPremium
Solution69.6%Medium
Binary Tree, Depth-First Search +1· 4 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
1722. Minimize Hamming Distance After Swap OperationsVideo
Solution69.6%Medium
Array, Depth-First Search +1· 3 companies
1740. Find Distance in a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1743. Restore the Array From Adjacent PairsVideo
Solution74.7%Medium
Array, Depth-First Search +1· 9 companies
1766. Tree of CoprimesVideo
Solution45.1%Hard
Array, Depth-First Search +3· 1 company
1778. Shortest Path in a Hidden GridVideoPremium
Solution44.5%Medium
Breadth-First Search, Depth-First Search +2· 3 companies
1810. Minimum Path Cost in a Hidden GridVideoPremium
Solution58.7%Medium
Breadth-First Search, Depth-First Search +3· 2 companies
1820. Maximum Number of Accepted InvitationsVideoPremium
Solution52.4%Medium
Array, Depth-First Search +2· 2 companies
1858. Longest Word With All PrefixesVideoPremium
Solution73.1%Medium
Depth-First Search, Trie· 1 company
1905. Count Sub IslandsVideo
Solution72.8%Medium
Array, Breadth-First Search +3· 5 companies
1932. Merge BSTs to Create Single BSTVideo
Solution40.3%Hard
Binary Search, Binary Tree +3· 3 companies
1938. Maximum Genetic Difference QueryVideo
Solution48.6%Hard
Array, Bit Manipulation +3· 1 company
1970. Last Day Where You Can Still CrossVideo
Solution68.7%Hard
Array, Binary Search +4· 4 companies
1971. Find if Path Exists in GraphVideo
Solution55.5%Easy
Breadth-First Search, Depth-First Search +2· 5 companies
1973. Count Nodes Equal to Sum of DescendantsVideoPremium
Solution77.4%Medium
Binary Tree, Depth-First Search +1· 1 company
1992. Find All Groups of FarmlandVideo
Solution75.6%Medium
Array, Breadth-First Search +2· 2 companies
1993. Operations on TreeVideo
Solution46.3%Medium
Array, Breadth-First Search +4· 3 companies
2003. Smallest Missing Genetic Value in Each SubtreeVideo
Solution48.4%Hard
Depth-First Search, Dynamic Programming +2
2049. Count Nodes With the Highest ScoreVideo
Solution52.6%Medium
Array, Binary Tree +2· 3 companies
2092. Find All People With SecretVideo
Solution48.4%Hard
Breadth-First Search, Depth-First Search +3· 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
2097. Valid Arrangement of PairsVideo
–66.5%Hard
Depth-First Search, Eulerian Circuit +1· 3 companies
2101. Detonate the Maximum BombsVideo
Solution50.0%Medium
Array, Breadth-First Search +4· 7 companies
2127. Maximum Employees to Be Invited to a MeetingVideo
Solution61.8%Hard
Depth-First Search, Graph +1· 5 companies
2192. All Ancestors of a Node in a Directed Acyclic GraphVideo
Solution62.1%Medium
Breadth-First Search, Depth-First Search +2· 4 companies
2204. Distance to a Cycle in Undirected GraphVideoPremium
Solution73.4%Hard
Breadth-First Search, Depth-First Search +2· 2 companies
2246. Longest Path With Different Adjacent CharactersVideo
Solution54.2%Hard
Array, Depth-First Search +4· 5 companies
2265. Count Nodes Equal to Average of SubtreeVideo
Solution88.6%Medium
Binary Tree, Depth-First Search +1· 4 companies
2277. Closest Node to Path in TreeVideoPremium
–62.1%Hard
Array, Breadth-First Search +2· 1 company
2307. Check for Contradictions in EquationsVideoPremium
Solution43.8%Hard
Array, Depth-First Search +2· 2 companies
2313. Minimum Flips in Binary Tree to Get ResultVideoPremium
Solution56.9%Hard
Binary Tree, Depth-First Search +2· 1 company
Showing 201–250 of 338