Binary trees are a complex structure where nodes are connected to each other with a maximum of two children. Take your understanding to the next level by learning about the top view of binary trees.

The top view of binary trees is a set of nodes that can be seen when viewing the structure from above. Enhance your skills and deepen your understanding of this fascinating structure.

Use the preorder traversal of the tree to traverse the tree & check that we have visited the current vertical level, & if visited then we can check for smaller horizontal level node & store it.