LeetCode The Hard Way

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144 problems

ProblemDifficultyFrequency Topics
949. Largest Time for Given DigitsMedium42%
ArrayStringBacktrackingEnumeration
916. Word SubsetsMedium42%
ArrayHash TableString
97. Interleaving StringMedium42%
StringDynamic Programming
2305. Fair Distribution of CookiesMedium42%
ArrayDynamic ProgrammingBacktrackingBit ManipulationBitmask
2133. Check if Every Row and Column Contains All NumbersEasy42%
ArrayHash TableMatrix
349. Intersection of Two ArraysEasy42%
ArrayHash TableTwo PointersBinary SearchSorting
1353. Maximum Number of Events That Can Be AttendedMedium42%
ArrayGreedySortingHeap (Priority Queue)
76. Minimum Window SubstringHard42%
Hash TableStringSliding Window
Odd Even Linked ListMedium42%
Linked List
796. Rotate StringEasy42%
StringString Matching
1636. Sort Array by Increasing FrequencyEasy42%
ArrayHash TableSorting
Remove Duplicate LettersMedium42%
StringStackGreedyMonotonic Stack
767. Reorganize StringMedium42%
Hash TableStringGreedySortingHeap (Priority Queue)Counting
4SumMedium42%
ArrayTwo PointersSorting
1108. Defanging an IP AddressEasy42%
String
925. Long Pressed NameEasy42%
Two PointersString
Two Sum II - Input Array Is SortedMedium42%
ArrayTwo PointersBinary Search
219. Contains Duplicate IIEasy42%
ArrayHash TableSliding Window
1394. Find Lucky Integer in an ArrayEasy42%
ArrayHash TableCounting
40. Combination Sum IIMedium42%
ArrayBacktracking
387. First Unique Character in a StringEasy42%
Hash TableStringQueueCounting
961. N-Repeated Element in Size 2N ArrayEasy42%
ArrayHash TablePigeonhole Principle
392. Is SubsequenceEasy42%
Two PointersStringDynamic Programming
Sliding Window MaximumHard42%
ArrayQueueSliding WindowHeap (Priority Queue)Monotonic QueueRange Minimum/Maximum Query
2965. Find Missing and Repeated ValuesEasy42%
ArrayHash TableMathMatrix
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