LeetCode 236. Lowest Common Ancestor of a Binary Tree(浜屽弶鏍戞眰涓ょ偣LCA)
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鏍囩锛?a href='http://www.mamicode.com/so/1/sof' title='sof'>sof str strong highlight code for val || int
棰樻剰锛?/strong>浜屽弶鏍戞眰涓ょ偣LCA銆?/span>
/**
* Definition for a binary tree node.
* struct TreeNode {
* int val;
* TreeNode *left;
* TreeNode *right;
* TreeNode(int x) : val(x), left(NULL), right(NULL) {}
* };
*/
class Solution {
public:
TreeNode* lowestCommonAncestor(TreeNode* root, TreeNode* p, TreeNode* q) {
if(root == NULL || root == p || root == q) return root;
TreeNode* left = lowestCommonAncestor(root -> left, p, q);
TreeNode* right = lowestCommonAncestor(root -> right, p, q);
if(left && right) return root;
return left ? left : right;
}
};
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