Combinatorics

43 LeetCode questions

Difficulty Distribution

Easy
3
7%
Medium
13
30%
Hard
27
63%

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Questions

TitleDifficulty
Unique PathsMedium
Count All Valid Pickup and Delivery OptionsHard
Count Ways to Build Rooms in an Ant ColonyHard
Sum of All Subset XOR TotalsEasy
Check If Digits Are Equal in String After Operations IIHard
Number of Sets of K Non-Overlapping Line SegmentsMedium
Count Ways to Make Array With ProductHard
Find Triangular Sum of an ArrayMedium
The Number of Beautiful SubsetsMedium
Distribute Candies Among Children IEasy
Distribute Candies Among Children IIMedium
Find Number of Ways to Reach the K-th StairHard
Find the Number of Possible Ways for an EventHard
Check If Digits Are Equal in String After Operations IEasy
Count the Number of Ideal ArraysHard
Manhattan Distances of All Arrangements of PiecesHard
Count the Number of Arrays with K Matching Adjacent ElementsHard
Kth Smallest InstructionsHard
Ugly Number IIIMedium
Maximum and Minimum Sums of at Most Size K SubsequencesMedium
Count the Number of Computer Unlocking PermutationsMedium
Find the Count of Monotonic Pairs IHard
Find the Count of Monotonic Pairs IIHard
Number of Music PlaylistsHard
Number of Ways to Reorder Array to Get Same BSTHard
Number of Ways to Rearrange Sticks With K Sticks VisibleHard
Count K-Subsequences of a String With Maximum BeautyHard
Count the Number of Good PartitionsHard
Right TrianglesMedium
Poor PigsHard
Sorted GCD Pair QueriesHard
Find the Count of Good IntegersHard
Count Number of Balanced PermutationsHard
Count Sorted Vowel StringsMedium
Find Nth Smallest Integer With K One BitsHard
Find Sum of Array Product of Magical SequencesHard
Count AnagramsHard
Number of Strings Which Can Be Rearranged to Contain SubstringMedium
Count the Number of Infection SequencesHard
Minimum Number of Operations to Make String SortedHard
Count K-Reducible Numbers Less Than NHard
Vowels of All SubstringsMedium
Find the N-th Value After K SecondsMedium

Showing 43 of 43 questions