洛谷P5715、P5716、P5718、P5722题题解（Java语言描述）

P5715题目要求

P5715题目链接

P5715分析

三个数的排序……不说啥了啊……

P5715AC代码（Java语言描述）

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int[] array = new int[] {scanner.nextInt(), scanner.nextInt(), scanner.nextInt()};
        scanner.close();
        Arrays.sort(array);
        System.out.println(array[0] + " " + array[1] + " " + array[2]);
    }
}

P5716题目要求

P5716题目链接

P5716分析

关键有两个，一是闰年的判断，二是算月份…… 很水啦……

P5716AC代码（Java语言描述）

import java.util.Scanner;

public class Main {

    private static int getDayNumber(boolean isLeapYear, int month) {
        switch (month) {
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                return 31;
            case 4:
            case 6:
            case 9:
            case 11:
                return 30;
            case 2:
                if (isLeapYear) {
                    return 29;
                } else {
                    return 28;
                }
            default:
                return -1;
        }
    }

    private static boolean judgeLeapYear(int year) {
        if (year % 400 == 0) {
            return true;
        } else if (year % 100 == 0) {
            return false;
        } else if (year % 4 == 0) {
            return true;
        } else {
            return false;
        }
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int year = scanner.nextInt(), month = scanner.nextInt();
        scanner.close();
        System.out.println(getDayNumber(judgeLeapYear(year), month));
    }
}

P5718题目要求

P5718题目链接

P5718分析

最小值的话跑一趟就完事……

P5718AC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 num = scanner.nextInt(), min = scanner.nextInt();
        for (int i = 1; i