题解 | #计算日期到天数转换#

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int year = scanner.nextInt();
        int mounth = scanner.nextInt();
        int day = scanner.nextInt();
        int[] mounth_day = {31,28,31,30,31,30,31,31,30,31,30,31};
        int days = 0;
        for (int i = 0; i < mounth-1; i++) {
            days+=mounth_day[i];
        }
        if(is_deapyear(year) && mounth>2){
            days+=day+1;
        } else {
            days+=day;
        }
        System.out.println(days);
    }

    private static boolean is_deapyear(int year) {
        return (year % 400 ==0)  || ((year % 4== 0) && (year%100!=0));
    }
}