杭电 2005 第几天？

题目链接：​​http://acm.hdu.edu.cn/showproblem.php?pid=2005​​​
水题，直接看代码：

#include<iostream>
#include<cstring>
#include<algorithm>
#include<cmath>
#define endl "\n"
#define PI 3.1415927
using namespace std;

int main(){
    int a[12]={31,29,31,30,31,30,31,31,30,31,30,31};
    int b[12]={31,28,31,30,31,30,31,31,30,31,30,31};
    int year,month,day;
    while(scanf("%d/%d/%d",&year,&month,&day)!=EOF){
        int sum=0;
        if(year%4==0&&year%100!=0||year%400==0){
            for(int i=0;i<month-1;i++){
                sum+=a[i];

            }
            sum+=day;
        }
        else{
            for(int i=0;i<month-1;i++){
                sum+=b[i];

            }
            sum+=day;
        }
        printf("%d\n",sum);
    } 
   return 0;

}