From cf2cea7e417a9d2bc946587d4a6ce48d6d4403d8 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sun, 26 Sep 2021 12:50:45 +0800
Subject: ...

---
 leetcode/lccup/2021/1.cpp | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 leetcode/lccup/2021/1.cpp

(limited to 'leetcode/lccup/2021')

diff --git a/leetcode/lccup/2021/1.cpp b/leetcode/lccup/2021/1.cpp
new file mode 100644
index 0000000..550da04
--- /dev/null
+++ b/leetcode/lccup/2021/1.cpp
@@ -0,0 +1,27 @@
+struct TreeNode {
+    int val;
+    TreeNode *left;
+    TreeNode *right;
+    TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
+};
+
+class Solution {
+public:
+    int visited[1001] {0};
+    int result = 0;
+
+    void DFS(TreeNode* r) {
+      if (!visited[r->val]) {
+        result += 1;
+        visited[r->val] = 1;
+      }
+
+      if (r->left) DFS(r->left);
+      if (r->right) DFS(r->right);
+    }
+
+    int numColor(TreeNode* root) {
+      DFS(root);
+      return result;
+    }
+};
\ No newline at end of file
-- 
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