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题解 | 判断质数-Java

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); ...

2025-09-04

3 34

题解 | 小红闯关-Java

import java.util.*; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n ...

2025-09-04

2 30

题解 | 小红的整数配对-Java

import java.util.*; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in....

2025-09-04

2 17

题解 | 交换到最大-Java

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n...

2025-09-04

4 22

题解 | 小红的魔法药剂-Java

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n...

2025-09-04

2 31

题解 | 小红的矩阵染色-Java

import java.util.Scanner; import java.util.ArrayList; import java.util.Collections; import java.util.List; public class Main { public static void...

2025-09-04

1 30

题解 | 排座椅-Java

import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc....

2025-09-03

2 24

题解 | 01序列-Java

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); ...

2025-09-03

2 28

题解 | 灵异背包？-Java

import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n...

2025-09-03

3 22

题解 | 最大 FST 距离-Java

关键变形 —— 拆解绝对值的和绝对值的和 |a| + |b| 有一个重要的数学性质：对于任意实数 a,b，等式|a| + |b| = max{ |a+b|, |a-b| }恒成立。我们可以通过分类讨论（基于 a 和 b 的符号组合）验证这个性质：1. 当 a ≥ 0, b ≥ 0 时：|a| + |...

2025-09-02

4 23