✨ [104] tree/dfs

Author: enkr1

104/my_solution.js

@@ -0,0 +1,30 @@
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * @param {TreeNode} root
+ * @return {number}
+ */
+const maxDepth = (root) => {
+  let depth = 0;
+
+  const dfs = (currNode, tmpDepth) => {
+    if (null !== currNode) {
+      tmpDepth++;
+      dfs(currNode.left, tmpDepth);
+      dfs(currNode.right, tmpDepth);
+    } else {
+      depth = Math.max(depth, tmpDepth);
+      return;
+    }
+  }
+
+  dfs(root, 0);
+
+  return depth;
+};

104/solution.js

@@ -0,0 +1,30 @@
+/**
+ * Definition for a binary tree node.
+ * function TreeNode(val, left, right) {
+ *     this.val = (val===undefined ? 0 : val)
+ *     this.left = (left===undefined ? null : left)
+ *     this.right = (right===undefined ? null : right)
+ * }
+ */
+/**
+ * @param {TreeNode} root
+ * @return {number}
+ */
+const maxDepth = (root) => {
+  let depth = 0;
+
+  const dfs = (currNode, tmpDepth) => {
+    if (null !== currNode) {
+      tmpDepth++;
+      dfs(currNode.left, tmpDepth);
+      dfs(currNode.right, tmpDepth);
+    } else {
+      depth = Math.max(depth, tmpDepth);
+      return;
+    }
+  }
+
+  dfs(root, 0);
+
+  return depth;
+};

README.md

@@ -36,6 +36,7 @@
 - [76. Minimum Window Substring](./76/)
 - [79. Word Search](./79/)
 - [83. Remove Duplicates from Sorted List](./83/)
+- [104. Maximum Depth of Binary Tree](./104/)
 - [121. Best Time to Buy and Sell Stock](./121/)
 - [128. Longest Consecutive Sequence](./128/)
 - [133. Clone Graph](./133/)
@@ -136,7 +137,7 @@ Batch create:
 NOTE: JS IS HERE
 -->
 ```ssh
-chapter=714 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
+chapter=104 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
 ```
 > then you can use `x` for quick debug.