Tree traversal - Wikipedia

Pre-order (node visited at position red ●): F, B, A, D, C, E, G, I, H;In-order (node visited at position green ●): A, B, C, D, E, F, G, H, I;Post-order (node visited at position blue ●): A, C, E, D, B, H, I, G, F. In depth-first search (DFS), the search tree is deepened as much as possible before going to the next sibling. To traverse binary trees with depth-first search, perform the following ope