上海交通大学 日期差值

#include<bits/stdc++.h>
#define ISYEAP(x) x%4==0&&x%100!=0||x%400==0?1:0
using namespace std;
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==13){
                month=1;
                year++;
            }
        }
    }
};
int buf[5001][13][32];
int main(){
    Date temp;
    temp.day=1;
    temp.month=1;
    temp.year=0;
    int cnt=0;
    while(temp.year!=5001){
        buf[temp.year][temp.month][temp.day]=cnt;
        cnt++;
        temp.nextday();
    }
    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;
}