import java.util.*;
/*
* public class TreeNode {
* int val = 0;
* TreeNode left = null;
* TreeNode right = null;
* public TreeNode(int val) {
* this.val = val;
* }
* }
*/
public class Solution {
/**
* 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
*
*
* @param root TreeNode类
* @param p int整型
* @param q int整型
* @return int整型
*/
public int lowestCommonAncestor (TreeNode root, int p, int q) {
// write code here
while(root!=null){
if(root.val>p&&root.val>q) root = root.left;
else if(root.val<p&&root.val<q) root = root.right;
else return root.val;
}
return 0;
}
}