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Array566 Dynamic Programming328 String188 Math182 Binary Search133 Hash Table132 Sorting104 Greedy102 Bit Manipulation101 Graph92 Depth-First Search88 Heap (Priority Queue)77 Prefix Sum75 Matrix74 Breadth-First Search70 All topics

Hard · With video · 942 results

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TitleSolutionAcceptDifficultyTopics

1912. Design Movie Rental SystemVideo

Solution62.5%Hard

Array, Design +3· 2 companies

1916. Count Ways to Build Rooms in an Ant ColonyVideo

Solution52.4%Hard

Combinatorics, Dynamic Programming +4· 1 company

1917. Leetcodify Friends RecommendationsVideoPremium

Solution29.0%Hard

Database· 1 company

1919. Leetcodify Similar FriendsVideoPremium

Solution43.5%Hard

Database· 1 company

1923. Longest Common SubpathVideo

Solution30.7%Hard

Array, Binary Search +3· 1 company

1924. Erect the Fence IIVideoPremium

–49.4%Hard

Array, Geometry +1· 1 company

1928. Minimum Cost to Reach Destination in TimeVideo

Solution42.6%Hard

Array, Dynamic Programming +1· 6 companies

1931. Painting a Grid With Three Different ColorsVideo

Solution77.2%Hard

Dynamic Programming· 7 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

1944. Number of Visible People in a QueueVideo

Solution73.3%Hard

Array, Monotonic Stack +1· 17 companies

1948. Delete Duplicate Folders in SystemVideo

Solution77.7%Hard

Array, Hash Function +3· 6 companies

1955. Count Number of Special SubsequencesVideo

Solution53.4%Hard

Array, Dynamic Programming· 1 company

1956. Minimum Time For K Virus Variants to SpreadVideoPremium

–49.5%Hard

Array, Binary Search +3

1960. Maximum Product of the Length of Two Palindromic SubstringsVideo

Solution32.1%Hard

Hash Function, Rolling Hash +1

1964. Find the Longest Valid Obstacle Course at Each PositionVideo

Solution62.8%Hard

Array, Binary Indexed Tree +1· 1 company

1970. Last Day Where You Can Still CrossVideo

Solution68.7%Hard

Array, Binary Search +4· 4 companies

1972. First and Last Call On the Same DayVideoPremium

Solution50.7%Hard

Database· 1 company

1977. Number of Ways to Separate NumbersVideo

Solution21.7%Hard

Dynamic Programming, String +1· 1 company

1982. Find Array Given Subset SumsVideo

Solution49.7%Hard

Array, Divide and Conquer· 1 company

1987. Number of Unique Good SubsequencesVideo

Solution52.7%Hard

Dynamic Programming, String· 2 companies

1994. The Number of Good SubsetsVideo

Solution37.8%Hard

Array, Bit Manipulation +3· 2 companies

1998. GCD Sort of an ArrayVideo

Solution51.3%Hard

Array, Math +3· 1 company

2003. Smallest Missing Genetic Value in Each SubtreeVideo

Solution48.4%Hard

Depth-First Search, Dynamic Programming +2

2004. The Number of Seniors and Juniors to Join the CompanyVideoPremium

Solution46.6%Hard

2005. Subtree Removal Game with Fibonacci TreeVideoPremium

–54.9%Hard

Binary Tree, Dynamic Programming +3· 1 company

2009. Minimum Number of Operations to Make Array ContinuousVideo

Solution52.0%Hard

Array, Binary Search +2· 5 companies

2010. The Number of Seniors and Juniors to Join the Company IIVideoPremium

Solution66.2%Hard

2014. Longest Subsequence Repeated k TimesVideo

Solution71.3%Hard

Backtracking, Counting +3· 3 companies

2019. The Score of Students Solving Math ExpressionVideo

Solution34.8%Hard

Array, Dynamic Programming +4· 2 companies

2025. Maximum Number of Ways to Partition an ArrayVideo

Solution36.2%Hard

Array, Counting +3· 2 companies

2030. Smallest K-Length Subsequence With Occurrences of a LetterVideo

Solution40.0%Hard

Greedy, Monotonic Stack +2· 1 company

2035. Partition Array Into Two Arrays to Minimize Sum DifferenceVideo

Solution24.4%Hard

Array, Binary Search +5· 9 companies

2040. Kth Smallest Product of Two Sorted ArraysVideo

Solution48.8%Hard

Array, Binary Search· 5 companies

2045. Second Minimum Time to Reach DestinationVideo

Solution62.3%Hard

Breadth-First Search, Graph +1· 1 company

2050. Parallel Courses IIIVideo

Solution67.0%Hard

Array, Dynamic Programming +2· 9 companies

2056. Number of Valid Move Combinations On ChessboardVideo

Solution48.7%Hard

Array, Backtracking +2· 2 companies

2060. Check if an Original String Exists Given Two Encoded StringsVideo

Solution43.6%Hard

Dynamic Programming, String· 2 companies

2065. Maximum Path Quality of a GraphVideo

Solution63.1%Hard

Array, Backtracking +1· 5 companies

2071. Maximum Number of Tasks You Can AssignVideo

Solution50.1%Hard

Array, Binary Search +4· 5 companies

2076. Process Restricted Friend RequestsVideo

Solution61.7%Hard

Graph, Union Find· 2 companies

2081. Sum of k-Mirror NumbersVideo

Solution63.7%Hard

Enumeration, Math· 5 companies

2088. Count Fertile Pyramids in a LandVideo

Solution66.5%Hard

Array, Dynamic Programming +1· 1 company

2092. Find All People With SecretVideo

Solution48.4%Hard

Breadth-First Search, Depth-First Search +3· 3 companies

2097. Valid Arrangement of PairsVideo

–66.5%Hard

Depth-First Search, Eulerian Circuit +1· 3 companies

2102. Sequentially Ordinal Rank TrackerVideo

Solution61.5%Hard

Data Stream, Design +2· 1 company

2106. Maximum Fruits Harvested After at Most K StepsVideo

Solution61.0%Hard

Array, Binary Search +2· 5 companies

2111. Minimum Operations to Make the Array K-IncreasingVideo

Solution41.1%Hard

Array, Binary Search· 1 company

2117. Abbreviating the Product of a RangeVideo

Solution25.0%Hard

Math· 1 company

2118. Build the EquationVideoPremium

Solution57.3%Hard

Showing 401–450 of 942