Recursion Tree

A recursion tree is a visual way to understand how a recursive algorithm breaks down a problem into smaller parts. Imagine a tree diagram where each node represents a problem, and branches show how that problem splits into subproblems. This structure helps analyze how many steps or operations are needed by summing the work at each level. It's like mapping out a family tree to see how a task divides into smaller tasks repeatedly, making it easier to estimate the total effort required to solve the original problem.