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蛇形矩阵

import java.util.*; public class Main { public Main() { } public String getResult(int n) { List<List<Integer>> laye...

Java

2020-08-12

0 489

字符串合并处理

import java.util.*; public class Main { private Map<Character, Character> map; public Main() { map = new HashMap<>(); ...

Java

2020-08-12

0 750

字符串分割

顺便把API也实现了 import java.util.*; public class Main { private List<String> list; public Main() { list = new LinkedList<>()...

Java

2020-08-11

1 676

整数与IP地址间的转换

import java.util.*; public class Main { private final int N = 4; public Main() { } public String convert(String str) { // i...

Java

2020-08-11

160 6058

按字节截取字符串

汉字是双字节，大于255 import java.util.*; public class Main { public Main() { } public String substring(String str, int k) { StringBuild...

Java

2020-08-11

0 693

201301 JAVA题目0-1级

dfs 搜索 import java.util.*; public class Main { public Main() { } private boolean dfs(List<Integer> bag, int target, int i) { ...

Java

2020-08-11

1 885

字符串匹配

Set 轻松解决 import java.util.*; public class Main { public Main() { } public boolean isAllCharExist(String pShortString, String pLongStrin...

Java

2020-08-11

18 2460

删除字符串中出现次数最少的字符

哈希表，时间O(N)，空间O(1) import java.util.*; public class Main { public Main() { } public String delete(String str) { // Map记录每个字母的次数 ...

Java

2020-08-11

53 5171

矩阵乘法

暴力解 import java.util.*; public class Main { public Main() { } public int[][] mul(int[][] mat1, int [][]mat2) { int x = mat1.length...

Java

2020-08-11

18 2022

单词倒排

正则表达式轻松解决 import java.util.*; public class Main { public Main() { } public String reverse(String str) { // 匹配非字母的字符进行分割 ...

Java

2020-08-11

67 5330