Algorithms, Interview, Leetcode, Faang, Tree Traversal.
the parent node Based on these 2 rules, we can go through the array and create the TreeNode necessary by comparing the node values. for (int i = 1; i < preorder.length; i++) { buildTree(root, preorder[i]); } public void buildTree(TreeNode node, int value) { if (node == null) return; if (value <