洛谷P5831题题解（Java语言描述）

题目要求

P5831题目链接

AC代码（Java语言描述）

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int line = scanner.nextInt(), num = scanner.nextInt(), counter = 0;
        int[] array = new int[21];
        boolean book[][] = new boolean[21][21];
        for (int p = line; p > 0; p--) {
            for(int i = 1; i