题解 | #计算日期到天数转换#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {

    private static int year = 0;
    private static int month = 0;
    private static int day = 0;
    private static int moreDay = 0;

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int a = in.nextInt();
            if(year == 0){
                year = a;
            } else if(month == 0){
                month = a;
            } else if(day == 0){
                day = a;
            }
        }

        result();
    }


    private static void result(){
        
        yearDay();
        int days =day;
        for(int i=1;i<month;i++){
            days += getDays(i);
        }
        
        System.out.print(days);
    }

    private static int getDays(int month1){

        if(1 == month1 || 3 == month1 || 5 == month1 || 7 == month1 || 8 == month1 || 10 == month1 || 12 == month1){
            return 31;
        } else if(2 == month1){
            return 28 + moreDay;
        } else {
            return 30;
        }
    }

    private static void yearDay(){
        if(year % 100 == 0){
            if(year % 400 == 0){
                moreDay = 1;
            }
        } else {
            if(year % 4 == 0){
                moreDay = 1;
            }
        }
    }
}