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- class Solution {
- public:
- TreeNode* invertTree(TreeNode* root) {
- if(root == NULL) return 0;
- if(root->left == NULL && root->right == NULL)
- return root;
- root->left = invertTree(root->left);
- root->right = invertTree(root->right);
- swap(root->left, root->right);
- return root;
- }
- };
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