1379. 找出克隆二叉树中的相同节点

找出克隆二叉树中的相同节点

• 难度: easy
• 原始链接: https://leetcode.cn/problems/find-a-corresponding-node-of-a-binary-tree-in-a-clone-of-that-tree
• 标签: 前序遍历

解法一: 前序遍历

java

/**
 * Definition for a binary tree node.
 * public class TreeNode {
 * int val;
 * TreeNode left;
 * TreeNode right;
 * TreeNode(int x) { val = x; }
 * }
 */

class Solution {
    public final TreeNode getTargetCopy(final TreeNode original, final TreeNode cloned, final TreeNode target) {
        if (original == null) {
            return null;
        } else if (original == target) {
            return cloned;
        }
        TreeNode ans = this.getTargetCopy(original.left, cloned.left, target);
        if (ans != null) {
            return ans;
        }
        return this.getTargetCopy(original.right, cloned.right, target);
    }
}