maximum-depth-of-binary-tree 풀이 추가

junzero741 · junzero741 · commit 95c217481799 · 2026-03-25T11:35:22.000+09:00
diff --git a/maximum-depth-of-binary-tree/junzero741.ts b/maximum-depth-of-binary-tree/junzero741.ts
@@ -0,0 +1,38 @@
+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)
+    }
+}
+
+// TC: O(N)
+// SC: O(N)
+function maxDepth(root: TreeNode | null): number {
+    if(!root) {
+        return 0;
+    }
+
+    let maxLv = 1;
+
+    function dfs(node: TreeNode, lv: number) {
+        if(node.left) {
+            dfs(node.left, lv+1)
+        }
+        if(node.right) {
+            dfs(node.right, lv+1)
+        }
+        maxLv = Math.max(maxLv, lv)
+    }
+
+
+    dfs(root, 1);
+    
+
+    return maxLv;
+
+    
+};
