Combinatorics

Combinatorics

• 3470. Permutations IV
• 3463. Check If Digits Are Equal in String After Operations II
• 3461. Check If Digits Are Equal in String After Operations I
• 3428. Maximum and Minimum Sums of at Most Size K Subsequences
• 3426. Manhattan Distances of All Arrangements of Pieces
• 3416. Subsequences with a Unique Middle Mode II
• 3405. Count the Number of Arrays with K Matching Adjacent Elements
• 3395. Subsequences with a Unique Middle Mode I
• 3352. Count K-Reducible Numbers Less Than N
• 3343. Count Number of Balanced Permutations
• 3317. Find the Number of Possible Ways for an Event
• 3312. Sorted GCD Pair Queries
• 3272. Find the Count of Good Integers
• 3251. Find the Count of Monotonic Pairs II
• 3250. Find the Count of Monotonic Pairs I
• 3247. Number of Subsequences with Odd Sum
• 3179. Find the N-th Value After K Seconds
• 3154. Find Number of Ways to Reach the K-th Stair
• 3128. Right Triangles
• 3116. Kth Smallest Amount With Single Denomination Combination
• 2963. Count the Number of Good Partitions
• 2954. Count the Number of Infection Sequences
• 2930. Number of Strings Which Can Be Rearranged to Contain Substring
• 2929. Distribute Candies Among Children II
• 2928. Distribute Candies Among Children I
• 2927. Distribute Candies Among Children III
• 2912. Number of Ways to Reach Destination in the Grid
• 2842. Count K-Subsequences of a String With Maximum Beauty
• 2638. Count the Number of K-Free Subsets
• 2597. The Number of Beautiful Subsets
• 2539. Count the Number of Good Subsequences
• 2514. Count Anagrams
• 2400. Number of Ways to Reach a Position After Exactly k Steps
• 2338. Count the Number of Ideal Arrays
• 2221. Find Triangular Sum of an Array
• 2063. Vowels of All Substrings
• 1916. Count Ways to Build Rooms in an Ant Colony
• 1866. Number of Ways to Rearrange Sticks With K Sticks Visible
• 1863. Sum of All Subset XOR Totals
• 1830. Minimum Number of Operations to Make String Sorted
• 1735. Count Ways to Make Array With Product
• 1643. Kth Smallest Instructions
• 1641. Count Sorted Vowel Strings
• 1621. Number of Sets of K Non-Overlapping Line Segments
• 1569. Number of Ways to Reorder Array to Get Same BST
• 1467. Probability of a Two Boxes Having The Same Number of Distinct Balls
• 1359. Count All Valid Pickup and Delivery Options
• 1201. Ugly Number III
• 920. Number of Music Playlists
• 634. Find the Derangement of An Array
• 458. Poor Pigs
• 62. Unique Paths