#include <stdio.h>
int main(){
int year,days=0;
printf("input the year:");
scanf("%d",&year);
if(year%4!=0){
days=28;
} else if(year%100!=0){
days=29;
} else if(year%400!=0){
days=28;
} else{
days=29;
}
printf("year:%d,month:2,days:%d",year,days);
return 0;
}