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2,209 problems

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Array2,209 String870 Hash Table786 Math682 Dynamic Programming666 Sorting504 Greedy480 Binary Search352 Depth-First Search335 Database303 Bit Manipulation283 Matrix278 Tree261 Breadth-First Search255 Two Pointers249 All topics

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TitleSolutionAcceptDifficultyTopics

1918. Kth Smallest Subarray SumVideoPremium

Solution53.4%Medium

Array, Binary Search +1· 1 company

1920. Build Array from PermutationVideo

Solution91.1%Easy

Array, Simulation· 5 companies

1921. Eliminate Maximum Number of MonstersVideo

Solution50.9%Medium

Array, Greedy +1· 3 companies

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

1926. Nearest Exit from Entrance in MazeVideo

Solution49.0%Medium

Array, Breadth-First Search +1· 9 companies

1928. Minimum Cost to Reach Destination in TimeVideo

Solution42.6%Hard

Array, Dynamic Programming +1· 6 companies

1929. Concatenation of ArrayVideo

Solution90.2%Easy

Array, Simulation· 7 companies

1936. Add Minimum Number of RungsVideo

Solution43.8%Medium

1937. Maximum Number of Points with CostVideo

Solution41.8%Medium

Array, Dynamic Programming +1· 4 companies

1938. Maximum Genetic Difference QueryVideo

Solution48.6%Hard

Array, Bit Manipulation +3· 1 company

1940. Longest Common Subsequence Between Sorted ArraysVideoPremium

Solution81.3%Medium

Array, Counting +1· 1 company

1942. The Number of the Smallest Unoccupied ChairVideo

Solution60.3%Medium

Array, Hash Table +1· 5 companies

1943. Describe the PaintingVideo

Solution53.3%Medium

Array, Hash Table +2· 3 companies

1944. Number of Visible People in a QueueVideo

Solution73.3%Hard

Array, Monotonic Stack +1· 17 companies

1946. Largest Number After Mutating SubstringVideo

Solution38.5%Medium

Array, Greedy +1· 1 company

1947. Maximum Compatibility Score SumVideo

Solution65.0%Medium

Array, Backtracking +3· 1 company

1948. Delete Duplicate Folders in SystemVideo

Solution77.7%Hard

Array, Hash Function +3· 6 companies

1950. Maximum of Minimum Values in All SubarraysVideoPremium

Solution48.0%Medium

Array, Monotonic Stack +1· 1 company

1953. Maximum Number of Weeks for Which You Can WorkVideo

Solution42.4%Medium

Array, Greedy· 3 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

1958. Check if Move is LegalVideo

Solution51.2%Medium

Array, Enumeration +1· 1 company

1959. Minimum Total Space Wasted With K Resizing OperationsVideo

Solution44.6%Medium

Array, Dynamic Programming· 1 company

1961. Check If String Is a Prefix of ArrayVideo

Solution52.7%Easy

Array, String +1· 1 company

1962. Remove Stones to Minimize the TotalVideo

Solution66.2%Medium

Array, Greedy +1· 5 companies

1964. Find the Longest Valid Obstacle Course at Each PositionVideo

Solution62.8%Hard

Array, Binary Indexed Tree +1· 1 company

1966. Binary Searchable Numbers in an Unsorted ArrayVideoPremium

Solution63.3%Medium

Array, Binary Search· 3 companies

1967. Number of Strings That Appear as Substrings in WordVideo

Solution86.1%Easy

Array, String· 6 companies

1968. Array With Elements Not Equal to Average of NeighborsVideo

Solution50.9%Medium

Array, Greedy +1· 1 company

1970. Last Day Where You Can Still CrossVideo

Solution68.7%Hard

Array, Binary Search +4· 4 companies

1975. Maximum Matrix SumVideo

Solution67.6%Medium

Array, Greedy +1· 6 companies

1979. Find Greatest Common Divisor of ArrayVideo

Solution83.4%Easy

Array, Math +1· 5 companies

1980. Find Unique Binary StringVideo

Solution81.2%Medium

Array, Backtracking +2· 5 companies

1981. Minimize the Difference Between Target and Chosen ElementsVideo

Solution36.8%Medium

Array, Dynamic Programming +1· 2 companies

1982. Find Array Given Subset SumsVideo

Solution49.7%Hard

Array, Divide and Conquer· 1 company

1983. Widest Pair of Indices With Equal Range SumVideoPremium

Solution54.0%Medium

Array, Hash Table +1· 1 company

1984. Minimum Difference Between Highest and Lowest of K ScoresVideo

Solution66.2%Easy

Array, Sliding Window +1· 5 companies

1985. Find the Kth Largest Integer in the ArrayVideo

Solution48.3%Medium

Array, Divide and Conquer +4· 1 company

1986. Minimum Number of Work Sessions to Finish the TasksVideo

Solution35.3%Medium

Array, Backtracking +3· 2 companies

1989. Maximum Number of People That Can Be Caught in TagVideoPremium

Solution49.4%Medium

1991. Find the Middle Index in ArrayVideo

Solution70.5%Easy

Array, Prefix Sum· 4 companies

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

1994. The Number of Good SubsetsVideo

Solution37.8%Hard

Array, Bit Manipulation +3· 2 companies

1995. Count Special QuadrupletsVideo

Solution65.1%Easy

Array, Enumeration +1· 3 companies

1996. The Number of Weak Characters in the GameVideo

Solution44.7%Medium

Array, Greedy +3· 1 company

1997. First Day Where You Have Been in All the RoomsVideo

Solution40.5%Medium

Array, Dynamic Programming· 1 company

1998. GCD Sort of an ArrayVideo

Solution51.3%Hard

Array, Math +3· 1 company

2001. Number of Pairs of Interchangeable RectanglesVideo

Solution53.1%Medium

Array, Counting +3· 2 companies

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