Merge pull request gzc426#302 from 018429/patch-2

gzc426 · web-flow · commit 02a1b0f649b8 · 2018-12-04T17:22:09.000+08:00
Create 云溪101.md
diff --git a/2018.12.4-leetcode101/云溪101.md b/2018.12.4-leetcode101/云溪101.md
@@ -0,0 +1,21 @@
+bool isSymmetricHelp(struct TreeNode* left,struct TreeNode* right);
+/**
+ * Definition for a binary tree node.
+ * struct TreeNode {
+ *     int val;
+ *     struct TreeNode *left;
+ *     struct TreeNode *right;
+ * };
+ */
+bool isSymmetric(struct TreeNode* root)
+{
+	return root==NULL|| isSymmetricHelp(root->left,root->right);
+}
+bool isSymmetricHelp(struct TreeNode* left,struct TreeNode* right)
+{
+	if(left==NULL||right==NULL)
+	return left==right;
+	if(left->val==right->val&&isSymmetricHelp(left->left,right->right)&&isSymmetricHelp(left->right,right->left))
+	return true;
+	return false;
+}
