题解 | #计算日期到天数转换#判断是否闰年，累加天数

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        int year=sc.nextInt();
        int month=sc.nextInt();
        int day=sc.nextInt();
        int[] arr=new int[]{31,28,31,30,31,30,31,31,30,31,30,31};
        int days=0;
        for(int i=0;i<month-1;i++){
            days+=arr[i];
        }
        if(isRun(year) && month>2){
            days+=1;
        }
        days+=day;
        System.out.println(days);
    }
    public static boolean isRun(int year){
        return year%400==0 || (year%4==0 && year%100!=0);
    }
}