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#include <stdio.h>
int day_of_year(int year, int month, int day);
void month_day(int year, int yearday, int *pmonth, int *pday);
int main() { return 0; }
static char daytab[2][13] = {
{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}};
int day_of_year(int year, int month, int day) {
int i, leap;
leap = year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
for (i = 1; i < month; i++)
day += daytab[leap][i];
return day;
}
void month_day(int year, int yearday, int *pmonth, int *pday) {
int i, leap;
leap = year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
for (i = 1; yearday > daytab[leap][i]; i++)
yearday -= daytab[leap][i];
*pmonth = i;
*pday = yearday;
}
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