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题解 | #删除有序链表中重复的元素-II#

import java.util.*; /* public class ListNode { int val; ListNode next = null; } */ public class Solution { /** * * @param head ListNode类 * @return L...

Java

2021-12-17

0 377

题解 | #二叉搜索树的后序遍历序列#

public class Solution { public boolean VerifySquenceOfBST(int [] sequence) { int len = sequence.length; if(len == 0){ return false; } return help(sequ...

Java

2021-12-17

2 357

题解 | #树的子结构#

/** public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; public TreeNode(int val) { this.val = val; } } */ public c...

Java

2021-12-17

0 402

题解 | #重建二叉树#

// / import java.util.Arrays; public class Solution { public TreeNode reConstructBinaryTree(int [] pre,int [] vin) { if (pre.length == 0 || vin.length...

Java

2021-12-17

0 327

题解 | #二叉搜索树的第k个节点#

import java.util.*; /* public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; public TreeNode(int val) { this.val = val; ...

Java

2021-12-17

0 344

题解 | #按之字形顺序打印二叉树#

import java.util.ArrayList; import java.util.Collections; /* public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; public ...

Java

2021-12-17

0 339

题解 | #最小的K个数#

import java.util.ArrayList; import java.lang.Math; import java.util.Arrays; public class Solution { public ArrayList GetLeastNumbers_Solution(int [] i...

Java

2021-12-16

0 246

题解 | #实现二叉树先序，中序和后序遍历#

import java.util.*; /* public class TreeNode { int val = 0; TreeNode left = null; TreeNode right = null; } */ public class Solution { /** * * @param...

Java

2021-12-16

0 288

题解 | #字符串压缩#

import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.IOException; public class Main{ public static void main(String[] args)...

Java

2021-12-16

0 420

题解 | #数字序列第n位的值#

import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class Main{ public static void main(String[] args)...

Java

2021-12-16

0 398