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/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ 阅读全文
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class Solution { public boolean verifyPostorder(int[] postorder) { return verifySquenceofBST(postorder,0,postorder.length-1); } boolean verifySquenceo 阅读全文
摘要：
/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ 阅读全文
摘要：
/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ 阅读全文
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import java.util.ArrayList; import java.util.Queue; import java.util.LinkedList; /** public class TreeNode { int val = 0; TreeNode left = null; TreeNo 阅读全文
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class Solution { public boolean validateStackSequences(int[] pushed, int[] popped) { Stack<Integer> stack = new Stack<>(); int index = 0; for(int x : 阅读全文