Topic
Combinatorics problems
25 problems: 4 Easy, 10 Medium, 11 Hard.
Easy (4)
Medium (10)
Hard (11)
- Distinct Subsequences
- K Inverse Pairs Array
- Student Attendance Record II
- Number of Ways to Stay in the Same Place
- Permutation Sequence
- Poor Pigs
- Numbers At Most N Given Digit Set
- Count Ways to Build Rooms in an Ant Colony
- Count Vowels Permutation
- k-th Lexicographic Permutation
- Binary Strings Without 3 Consecutive Equal