每日一题系列：淘宝网店

牛客网连接：https://www.nowcoder.com/questionTerminal/754921e9c98b43d1b2d70c227b844101?toCommentId=13055397 NowCoder在淘宝上开了一家网店。他发现在月份为素数的时候，当月每天能赚1元；否则每天能赚2元。 现在给你一段时间区间，请你帮他计算总收益有多少。

案例已全部通过

import java.util.*;
public class Main{
          
   
     public static int  month(int year,int month) {
          
   //判断这年这个月共多少天
        if (month == 2) {
          
   
            //判断年是不是闰年
            if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
          
   
                return 29;
            } else {
          
   
                return 28;
            }
        } else if (month == 4 || month == 6 || month == 9 || month == 11) {
          
   
            return 30;
        } else {
          
   
            return 31;

        }
    }

    public static int func(int m) {
          
   //判断这个月是不是素数月，每天能拿多少钱
        //素数月有2，3，5，7，11
        int x=0;
        if (m == 2 || m == 3 || m == 5 || m == 7 || m == 11) {
          
   //素数月赚1快
            x = 1;
        } else {
          
   
            x = 2;
        }
        return x;
    }
        public static void main (String[]args){
          
   
            Scanner scanner = new Scanner(System.in);
            while (scanner.hasNext()) {
          
   
                int y1 = scanner.nextInt();
                int m1 = scanner.nextInt();
                int d1 = scanner.nextInt();

                int y2 = scanner.nextInt();
                int m2 = scanner.nextInt();
                int d2 = scanner.nextInt();

                int sum = 0;//标记赚的钱

                if (y1 - y2 == 0) {
          
   //同一年
                    for (int m = m1; m <= m2; m++) {
          
   
                        int x = func(m);
                        if (m1 != m2) {
          
   
                            if (m == m1) {
          
   //第一月
                                sum += (month(y1, m1) - d1 + 1) * x;
                            } else if (m > m1 && m < m2) {
          
   //中间月
                                sum += month(y1, m) * x;
                            } else {
          
   //最后一月
                                sum += d2 * x;
                            }
                        } else {
          
   
                            sum += (d2 - d1 + 1) * x;
                        }

                    }
                } else {
          
   //不同年
                    for (int m = m1; m <= 12; m++) {
          
   //第一年
                        int x = func(m);
                        if (m == m1) {
          
   
                            sum += (month(y1, m1) - d1 + 1) * x;
                        } else {
          
   
                            sum += month(y1, m) * x;
                        }
                    }

                    if (y2 - y1 > 1) {
          
   
                        int tmpYear = y1 + 1;
                        while (tmpYear < y2) {
          
   
                            for (int m = 1; m <= 12; m++) {
          
   
                                int x = func(m);
                                sum += month(tmpYear, m)*x;
                            }
                            tmpYear++;
                        }
                    }

                    for (int m = 1; m < m2; m++) {
          
   //最后一年
                        int x = func(m);

                        sum += month(y2, m) * x;
                    }
                    int x = func(m2);
                    sum += d2*x;
                }
                System.out.println(sum);
            }

        }
}