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- bool Symmetric(struct TreeNode* lroot,struct TreeNode*rroot){
- if(lroot==NULL&&rroot==NULL)return true;
- if(lroot==NULL||rroot==NULL)return false;
-
- return (lroot->val==rroot->val)&&Symmetric(lroot->left,rroot->right)&&Symmetric(lroot->right,rroot->left);
-
- }
-
- bool isSymmetric(struct TreeNode* root){
- return Symmetric(root,root);//同时传两个根节点
- }
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