Introduction to Subsets
Explore the subsets pattern to understand how to generate all possible combinations of elements in a data structure. This lesson helps you grasp the method of incrementally building subsets and applying it to problems involving permutations, combination sums, and more. You will learn when and how to use this pattern, including the role of backtracking, to solve coding interview questions effectively.
We'll cover the following...
About the pattern
The subsets pattern is an important strategy to solve coding problems that involve exploring all possible combinations of elements from a given data structure. This pattern can be useful when dealing with sets containing unique elements or arrays/lists that may contain duplicate elements. It is used to generate all specific subsets based on the conditions that the problem provides us.
The common method used is to build the subsets incrementally, including or excluding each element of the original data structure, depending on the constraints of the problem. This process is continued for the remaining elements until all desired subsets have been generated.
Here is the template for generating all subsets, where we incrementally include or exclude ...