标签:stat nod val new 二叉树 amp 指正 als tor
/**
* 二叉树中两个节点的最低公共祖节点
*/
public class LowerAncestors {
public static Node lowerAncestors(Node head, Node o1, Node o2) {
return process(head, o1, o2).result;
}
private static ResultInfo process(Node node, Node o1, Node o2) {
if (node == null) {
return new ResultInfo(null, false, false);
}
ResultInfo leftInfo = process(node.left, o1, o2);
ResultInfo rightInfo = process(node.right, o1, o2);
boolean findO1 = node == o1 || leftInfo.findO1 || rightInfo.findO1;
boolean findO2 = node == o2 || leftInfo.findO2 || rightInfo.findO2;
Node result = leftInfo.result != null ? leftInfo.result : rightInfo.result != null ? rightInfo.result : null;
result = result == null && findO1 && findO2 ? node : result;
return new ResultInfo(result, findO1, findO2);
}
public static class ResultInfo {
public Node result;
public boolean findO1;
public boolean findO2;
public ResultInfo(Node node, boolean b1, boolean b2) {
result = node;
findO1 = b1;
findO2 = b2;
}
}
public static class Node {
public int value;
public Node left;
public Node right;
public Node(int data) {
this.value = data;
}
}
}
/* 如有意见或建议,欢迎评论区留言;如发现代码有误,欢迎批评指正 */
标签:stat nod val new 二叉树 amp 指正 als tor
原文地址:https://www.cnblogs.com/laydown/p/12995010.html