2385. Amount of Time for Binary Tree to Be Infected

You are given the root of a binary tree with unique values, and an integer start. At minute 0, an infection starts from the node with value start. Each minute, a node becomes infected if: - The node is currently uninfected. - The node is adjacent to an infected node. Return the number of minutes needed for the entire tree to be infected. Example 1: Input: root = [1,5,3,null,4,10,6,9,2], st