#include <stdio.h>
main()
{
int year, month, days;
switch (month) {
case 1: case 3: case 5: case 7: case 8:
case 10: case 12:
days = 31;
break;
case 4: case 6: case 9: case 11:
days = 30;
break;
case 2:
if ((year % 400 == 0) ||
(year % 4 == 0 && (year % 100 != 0)))
days = 29;
else
days = 28;
break;
default:
days = 0;
}
return 0;
}
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