题目6 日期差值

 1 import java.util.Arrays;
 2 import java.util.Comparator;
 3 import java.util.Scanner;
 4 
 5 public class Main{
 6     public static void main(String[]args){
 7         Date t=new Date();
 8         t.year=0;
 9         t.month=1;
10         t.day=1;
11         int count=0;
12         while(t.year!=5001){
13             buf[t.year][t.month][t.day]=count;
14             t.nextDate();
15             count++;
16         }
17         
18         Scanner in=new Scanner(System.in);
19         while(in.hasNext()){
20             String day=in.nextLine();
21             String y=day.substring(0, 4);
22             int y_=Integer.valueOf(y);
23             String m=day.substring(4, 6);
24             int m_=Integer.valueOf(m);
25             String d=day.substring(6, 8);
26             int d_=Integer.valueOf(d);
27             int x1=buf[y_][m_][d_];
28              day=in.nextLine();
29              y=day.substring(0, 4);
30              y_=Integer.valueOf(y);
31              m=day.substring(4, 6);
32              m_=Integer.valueOf(m);
33              d=day.substring(6, 8);
34              d_=Integer.valueOf(d);
35              int x2=buf[y_][m_][d_];
36              System.out.println(Math.abs(x1-x2)+1);
37         }
38      }
39     private static int isYeap(int x){
40         if(x%4==0&&x%100!=0||x%400==0) return 1;
41         else return 0;
42     }
43     private static int[][]dayOfMonth={
44             {0,0},
45             {31,31},
46             {28,29},
47             {31,31},
48             {30,30},
49             {31,31},
50             {30,30},
51             {31,31},
52             {31,31},
53             {30,30},
54             {31,31},
55             {30,30},
56             {31,31}
57     };
58     private static class Date{
59         int year;
60         int month;
61         int day;
62         void nextDate(){
63             day++;
64             if(day>dayOfMonth[month][isYeap(year)]){
65                 day=1;
66                 month++;
67             }
68             if(month>12){
69                 month=1;
70                 year++;
71             }
72         }
73     }
74     private static int[][][]buf=new int[5001][13][32];
75 }