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Combinatorics DSA Problems

Combinatorics is an important concept in data structures and algorithms. Practice these problems to master Combinatorics and prepare for technical interviews.

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Difficulty: Hard
458. Poor Pigs
HardAdobe +2Combinatorics +259.411%
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920. Number of Music Playlists
HardAmazon +3Combinatorics +260.2671%
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1359. Count All Valid Pickup and Delivery Options
HardApple +3Combinatorics +264.9167%
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1467. Probability of a Two Boxes Having The Same Number of Distinct Balls
HardArray +559.9882%
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1569. Number of Ways to Reorder Array to Get Same BST
HardGoogleArray +953.4594%
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1643. Kth Smallest Instructions
HardHeavyWaterArray +347.3879%
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1735. Count Ways to Make Array With Product
HardAmazonArray +451.8414%
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1830. Minimum Number of Operations to Make String Sorted
HardSamsungCombinatorics +250.0893%
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1866. Number of Ways to Rearrange Sticks With K Sticks Visible
HardGoogleCombinatorics +258.0829%
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1916. Count Ways to Build Rooms in an Ant Colony
HardAdobeCombinatorics +548.9364%
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2338. Count the Number of Ideal Arrays
HardInfosysCombinatorics +326.9159%
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2514. Count Anagrams
HardMathworksCombinatorics +434.0654%
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2842. Count K-Subsequences of a String With Maximum Beauty
HardGoogleCombinatorics +429.4015%
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2912. Number of Ways to Reach Destination in the Grid
HardUberCombinatorics +259.9507%
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2927. Distribute Candies Among Children III
HardAmazon +1Combinatorics +144.0837%
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2954. Count the Number of Infection Sequences
HardSAP +1Array +234.6689%
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2963. Count the Number of Good Partitions
HardGoogleArray +347.1652%
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3116. Kth Smallest Amount With Single Denomination Combination
HardArray +516.9676%
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3154. Find Number of Ways to Reach the K-th Stair
HardBit Manipulation +435.2623%
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3250. Find the Count of Monotonic Pairs I
HardArray +445.7947%
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