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66 problems

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Tree Array578 Dynamic Programming332 String191 Math187 Binary Search136 Hash Table134 Sorting106 Greedy104 Bit Manipulation103 Graph96 Depth-First Search91 Heap (Priority Queue)78 Prefix Sum77 Matrix75 Breadth-First Search71 All topics

Hard · 66 results

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TitleSolutionAcceptDifficultyTopics

3486. Longest Special Path IIVideo

–19.8%Hard

Array, Depth-First Search +3· 1 company

3515. Shortest Path in a Weighted TreeVideo

–41.5%Hard

Array, Binary Indexed Tree +3· 1 company

3526. Range XOR Queries with Subarray ReversalsPremium

–62.4%Hard

Array, Binary Tree +1

3544. Subtree Inversion SumVideo

–41.6%Hard

Array, Depth-First Search +2

3553. Minimum Weighted Subgraph With the Required Paths IIVideo

–48.2%Hard

Array, Bit Manipulation +3

3559. Number of Ways to Assign Edge Weights IIVideo

Solution71.8%Hard

Array, Bit Manipulation +4· 3 companies

3562. Maximum Profit from Trading Stocks with DiscountsVideo

Solution56.1%Hard

Array, Depth-First Search +2· 2 companies

3575. Maximum Good Subtree ScoreVideo

–44.0%Hard

Array, Bit Manipulation +4· 1 company

3585. Find Weighted Median Node in TreeVideo

Solution26.7%Hard

Array, Binary Search +4· 1 company

3590. Kth Smallest Path XOR SumVideo

Solution30.1%Hard

Array, Depth-First Search +2

3715. Sum of Perfect Square AncestorsVideo

–41.3%Hard

Array, Counting +5· 3 companies

3772. Maximum Subgraph Score in a TreeVideo

–65.4%Hard

Array, Depth-First Search +2· 1 company

3786. Total Sum of Interaction Cost in Tree GroupsVideo

–50.8%Hard

Array, Depth-First Search +1· 1 company

3812. Minimum Edge Toggles on a TreeVideo

Solution65.6%Hard

Depth-First Search, Graph +3

3841. Palindromic Path Queries in a TreeVideo

–34.8%Hard

Array, Divide and Conquer +3

3939. Count Non Adjacent Subsets in a Rooted TreeVideo

–51.7%Hard

Array, Depth-First Search +2· 1 company

Showing 51–66 of 66