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全部文章（共149篇）

字符个数统计

import java.util.Scanner; import java.util.Set; import java.util.HashSet; public class Main { public Main() { Scanner in = new Scanner(...

2020-08-07

2 713

数字颠倒

import java.util.Scanner; public class Main { private static String getString(int number) { StringBuilder s = new StringBuilder(); ...

2020-08-07

7 1432

[Java] 进制转换

使用Map提高查找效率 import java.util.*; public class Main { private final static int BASE = 16; private static Map<Character, Integer> map = new Ha...

Java

2020-08-07

195 16660

二进制中1的个数

public class Solution { public int NumberOf1(int n) { int count = 0; while (n != 0) { // n < 0，则符号位为1 ...

2020-05-14

2 536

序列化二叉树

public class Solution { String Serialize(TreeNode root) { // 每个结点以"!"分隔开，方便后续的反序列化 if (root == null) { return "#!"; ...

2020-05-07

1 772

按之字形顺序打印二叉树

public class Solution { public ArrayList<ArrayList<Integer> > Print(TreeNode pRoot) { ArrayList<ArrayList<Integer> &g...

2020-05-07

1 772

二叉树的下一个结点

public class Solution { public TreeLinkNode GetNext(TreeLinkNode pNode) { if (pNode == null) { return null; } ...

2020-05-07

1 632

链表中环的入口结点

public class Solution { public ListNode EntryNodeOfLoop(ListNode pHead) { ListNode intersect = getIntersect(pHead); if (intersect ...

2020-05-07

1 762

删除链表中重复的结点

public class Solution { public ListNode deleteDuplication(ListNode pHead) { if (pHead == null) { return null; } ...

2020-05-07

1 686