#include<stdio.h>
int main(void)
{
    int year,month,day;
    int day_of_year(int year,int month,int day);
    printf("year,month,day:");
    scanf("%d%d%d",&year,&month,&day);
    day_of_year(year,month,day);
    printf("days of year:%d\n",day);
    return 0;
}
int day_of_year(int year,int month,int day)
{
    int k,leap;
    int tab[2][3]={
        {0,31,28,31,30,31,30,31,31,30,31,30,31},
        {0,31,29,31,30,31,30,31,31,30,31,30,31}
    };
    leap=(year%4==0&&year%100!=0||year%400==0);
    for(k=1;k<month;k++)
        day=day+tab[leap][k];
    return day;
}