I really can’t wrap my head around a phrase “0’ sum can always be found through an empty set”. Why do we have T for all sets when sum is 0? I do understand that it’s necessary for correct solution, but can’t get it intuitively.
Course: Grokking the Coding Interview: Patterns for Coding Questions - Learn Interactively
Lesson: https://www.educative.io/courses/grokking-the-coding-interview/g7QYlD8RwRr