#include<stdio.h>

struct tian

{

int year;

int month;

int day;

};

int days(int year,int month,int day)

{

int s=0,i,a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};

if(year%4==0&&year%100!=0||year%400==0)

a[2]=29;

for(i=1;i<month;i++)

s+=a[i];

s=s+day;

return s;

}

void main()

{

int k=0;

struct tian a;

printf("輸入年月日:");

scanf("%d%d%d",&a.year,&a.month,&a.day);

k=days(a.year,a.month,a.day);

printf("%d年%d月%d日是第%d天\n",a.year,a.month,a.day,k);

}