Maximum Depth of Binary Tree

Author: casentino

maximum-depth-of-binary-tree/casentino.ts

@@ -0,0 +1,36 @@
+/**
+ * Definition for a binary tree node.
+ * class TreeNode {
+ *     val: number
+ *     left: TreeNode | null
+ *     right: TreeNode | null
+ *     constructor(val?: number, left?: TreeNode | null, right?: TreeNode | null) {
+ *         this.val = (val===undefined ? 0 : val)
+ *         this.left = (left===undefined ? null : left)
+ *         this.right = (right===undefined ? null : right)
+ *     }
+ * }
+ */
+
+function maxDepth(root: TreeNode | null): number {
+  function recursive(node: TreeNode | null, count: number) {
+    if (!node) {
+      return count;
+    }
+    const left = recursive(node.left, count + 1);
+    const right = recursive(node.right, count + 1);
+    return left > right ? left : right;
+  }
+  return recursive(root, 0);
+}
+
+class TreeNode {
+  val: number;
+  left: TreeNode | null;
+  right: TreeNode | null;
+  constructor(val?: number, left?: TreeNode | null, right?: TreeNode | null) {
+    this.val = val === undefined ? 0 : val;
+    this.left = left === undefined ? null : left;
+    this.right = right === undefined ? null : right;
+  }
+}