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Problems

264 problems

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

264 results

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TitleSolutionAcceptDifficultyTopics
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
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
1600. Throne InheritanceVideo
Solution68.2%Medium
Depth-First Search, Design +2· 2 companies
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
1617. Count Subtrees With Max Distance Between CitiesVideo
Solution67.4%Hard
Bit Manipulation, Bitmask +3
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
1719. Number Of Ways To Reconstruct A TreeVideo
Solution46.3%Hard
Graph, Tree· 1 company
1740. Find Distance in a Binary TreeVideoPremium
Solution74.3%Medium
Binary Tree, Breadth-First Search +3· 2 companies
1766. Tree of CoprimesVideo
Solution45.1%Hard
Array, Depth-First Search +3· 1 company
1902. Depth of BST Given Insertion OrderVideoPremium
Solution42.5%Medium
Array, Binary Search Tree +3
1916. Count Ways to Build Rooms in an Ant ColonyVideo
Solution52.4%Hard
Combinatorics, Dynamic Programming +4· 1 company
1932. Merge BSTs to Create Single BSTVideo
Solution40.3%Hard
Binary Search, Binary Tree +3· 3 companies
1973. Count Nodes Equal to Sum of DescendantsVideoPremium
Solution77.4%Medium
Binary Tree, Depth-First Search +1· 1 company
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
2005. Subtree Removal Game with Fibonacci TreeVideoPremium
–54.9%Hard
Binary Tree, Dynamic Programming +3· 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
2236. Root Equals Sum of ChildrenVideo
Solution84.8%Easy
Binary Tree, Tree· 5 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
2313. Minimum Flips in Binary Tree to Get ResultVideoPremium
Solution56.9%Hard
Binary Tree, Depth-First Search +2· 1 company
2322. Minimum Score After Removals on a TreeVideo
Solution76.2%Hard
Array, Bit Manipulation +2· 4 companies
2331. Evaluate Boolean Binary TreeVideo
Solution82.7%Easy
Binary Tree, Depth-First Search +1· 1 company
2368. Reachable Nodes With RestrictionsVideo
Solution60.8%Medium
Array, Breadth-First Search +5· 2 companies
2378. Choose Edges to Maximize Score in a TreeVideoPremium
Solution57.1%Medium
Depth-First Search, Dynamic Programming +1· 1 company
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
2421. Number of Good PathsVideo
Solution56.7%Hard
Array, Graph +4· 3 companies
2440. Create Components With Same ValueVideo
Solution54.0%Hard
Array, Depth-First Search +3· 1 company
2445. Number of Nodes With Value OneVideoPremium
Solution66.3%Medium
Binary Tree, Breadth-First Search +2· 1 company
Showing 151–200 of 264