1096.日期差值

#include<stdio.h>
#define ISYEAP(x) x%100!=0 && x%4==0 || x%400==0?1:0

int dayofmonth[13][2]=
{
    0,0,
    31,31,
    28,29,
    31,31,
    30,30,
    31,31,
    30,30,
    31,31,
    31,31,
    30,30,
    31,31,
    30,30,
    31,31,
};

struct date{
    int day;
    int month;
    int year;
    void nextday()
    {
        day++;
        if(day>dayofmonth[month][ISYEAP(year)]){
            day=1;
            month++;
            if(month>12)
            {
                month=1;
                year++;
            }
        }
    }
};

int buf[5001][13][32];
int Abs(int x){
    return x<0?-x:x;
}

int main(){
    date temp;
    int cnt=0;
    temp.day=1;
    temp.month=1;
    temp.year=0;
    while(temp.year!=5001){
        buf[temp.year][temp.month][temp.day]=cnt;
        temp.nextday();
        cnt++;
    }
    int d1,m1,y1;
    int d2,m2,y2;
    while(scanf("%4d%2d%2d",&y1,&m1,&d1)!=EOF)
    {
        scanf("%4d%2d%2d",&y2,&m2,&d2);
        printf("%d\n",Abs(buf[y2][m2][d2]-buf[y1][m1][d1])+1); 
    }
    return 0;
}