题解 | #计算日期到天数转换#

import java.util.Scanner;

import java.time.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.nextLine();
        String[] ss = s.split(" ");
        LocalDate date =  LocalDate.of(Integer.valueOf(ss[0]), Integer.valueOf(ss[1]),
                                       Integer.valueOf(ss[2]));

        System.out.println(date.getDayOfYear());

    }
}