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Problems

870 problems

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Array2,209String870Hash Table786Math682Dynamic Programming666Sorting504Greedy480Binary Search352Depth-First Search335Database303Bit Manipulation283Matrix278Tree261Breadth-First Search255Two Pointers249All topics

With video · 870 results

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TitleSolutionAcceptDifficultyTopics
1903. Largest Odd Number in StringVideo
Solution67.7%Easy
Greedy, Math +1· 6 companies
1904. The Number of Full Rounds You Have PlayedVideo
Solution43.9%Medium
Math, String· 1 company
1910. Remove All Occurrences of a SubstringVideo
Solution78.2%Medium
Simulation, Stack +1· 13 companies
1915. Number of Wonderful SubstringsVideo
Solution66.8%Medium
Bit Manipulation, Hash Table +2· 2 companies
1927. Sum GameVideo
Solution63.5%Medium
Game Theory, Greedy +2· 1 company
1930. Unique Length-3 Palindromic SubsequencesVideo
Solution73.8%Medium
Bit Manipulation, Hash Table +2· 6 companies
1933. Check if String Is Decomposable Into Value-Equal SubstringsVideoPremium
Solution50.4%Easy
String
1935. Maximum Number of Words You Can TypeVideo
Solution82.9%Easy
Hash Table, String· 4 companies
1941. Check if All Characters Have Equal Number of OccurrencesVideo
Solution79.4%Easy
Counting, Hash Table +1· 4 companies
1945. Sum of Digits of String After ConvertVideo
Solution74.9%Easy
Simulation, String· 5 companies
1946. Largest Number After Mutating SubstringVideo
Solution38.5%Medium
Array, Greedy +1· 1 company
1948. Delete Duplicate Folders in SystemVideo
Solution77.7%Hard
Array, Hash Function +3· 6 companies
1957. Delete Characters to Make Fancy StringVideo
Solution74.1%Easy
String· 6 companies
1960. Maximum Product of the Length of Two Palindromic SubstringsVideo
Solution32.1%Hard
Hash Function, Rolling Hash +1
1961. Check If String Is a Prefix of ArrayVideo
Solution52.7%Easy
Array, String +1· 1 company
1963. Minimum Number of Swaps to Make the String BalancedVideo
Solution78.0%Medium
Greedy, Stack +2· 12 companies
1967. Number of Strings That Appear as Substrings in WordVideo
Solution86.1%Easy
Array, String· 6 companies
1974. Minimum Time to Type Word Using Special TypewriterVideo
Solution79.1%Easy
Greedy, String· 3 companies
1977. Number of Ways to Separate NumbersVideo
Solution21.7%Hard
Dynamic Programming, String +1· 1 company
1980. Find Unique Binary StringVideo
Solution81.2%Medium
Array, Backtracking +2· 5 companies
1985. Find the Kth Largest Integer in the ArrayVideo
Solution48.3%Medium
Array, Divide and Conquer +4· 1 company
1987. Number of Unique Good SubsequencesVideo
Solution52.7%Hard
Dynamic Programming, String· 2 companies
2000. Reverse Prefix of WordVideo
Solution86.3%Easy
Stack, String +1· 5 companies
2002. Maximum Product of the Length of Two Palindromic SubsequencesVideo
Solution63.0%Medium
Backtracking, Bit Manipulation +3· 2 companies
2011. Final Value of Variable After Performing OperationsVideo
Solution90.6%Easy
Array, Simulation +1· 5 companies
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
2023. Number of Pairs of Strings With Concatenation Equal to TargetVideo
Solution75.6%Medium
Array, Counting +2· 2 companies
2024. Maximize the Confusion of an ExamVideo
Solution70.4%Medium
Binary Search, Prefix Sum +2· 4 companies
2027. Minimum Moves to Convert StringVideo
Solution58.4%Easy
Greedy, String· 3 companies
2030. Smallest K-Length Subsequence With Occurrences of a LetterVideo
Solution40.0%Hard
Greedy, Monotonic Stack +2· 1 company
2038. Remove Colored Pieces if Both Neighbors are the Same ColorVideo
Solution62.8%Medium
Game Theory, Greedy +2· 3 companies
2042. Check if Numbers Are Ascending in a SentenceVideo
Solution73.6%Easy
String
2047. Number of Valid Words in a SentenceVideo
Solution31.6%Easy
String· 3 companies
2053. Kth Distinct String in an ArrayVideo
Solution82.1%Easy
Array, Counting +2· 2 companies
2055. Plates Between CandlesVideo
Solution47.4%Medium
Array, Binary Search +2· 3 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
2062. Count Vowel Substrings of a StringVideo
Solution73.6%Easy
Hash Table, String· 12 companies
2063. Vowels of All SubstringsVideo
Solution55.3%Medium
Combinatorics, Dynamic Programming +2· 2 companies
2067. Number of Equal Count SubstringsVideoPremium
Solution45.1%Medium
Counting, Prefix Sum +1· 1 company
2068. Check Whether Two Strings are Almost EquivalentVideo
Solution64.5%Easy
Counting, Hash Table +1· 1 company
2075. Decode the Slanted CiphertextVideo
Solution67.3%Medium
Simulation, String· 3 companies
2083. Substrings That Begin and End With the Same LetterVideoPremium
Solution74.1%Medium
Counting, Hash Table +3
2085. Count Common Words With One OccurrenceVideo
Solution73.9%Easy
Array, Counting +2· 1 company
2086. Minimum Number of Food Buckets to Feed the HamstersVideo
Solution48.1%Medium
Dynamic Programming, Greedy +1· 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
2103. Rings and RodsVideo
Solution81.5%Easy
Hash Table, String· 1 company
2108. Find First Palindromic String in the ArrayVideo
Solution83.9%Easy
Array, String +1
2109. Adding Spaces to a StringVideo
Solution71.8%Medium
Array, Simulation +2· 5 companies
Showing 451–500 of 870