share my easy understanding C++ solution

  • 0
    class Solution {
        bool helper(TreeNode *root,TreeNode *mirror){
            if(root==NULL&&mirror==NULL) return true;
            else if(root!=NULL&&mirror!=NULL){
                if(root->val==mirror->val) {
                    bool a=helper(root->left,mirror->right);
                    bool b=helper(root->right,mirror->left);
                    return a&b;
                else return false;
                return false;
        bool isSymmetric(TreeNode* root) {
            return helper(root,root);

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