Abstract
- The selection of items from a larger set without considering the order of selection. That means each combination has an unique set of items
- The number of combinations can be calculated using the Binomial Coefficient
Combination Questions
Single Set
Multiple Sets
- 17. Letter Combinations of a Phone Number - essentially, finding the Cartesian Product involves treating each phone number as a Set
Partition (分割)
Important
Basically Combination Questions without re-using the same element.