C++ :

#include<iostream>
using namespace std;
struct date{
	int year,month,day;
};
date a;
int days(date a)
{
	int b[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
	int ans=a.day;
	for (int i=1; i<a.month; i++) ans+=b[i];
	if (a.year%4==0 && a.year%100!=0 || a.year%400==0) ans++;
	return ans;
}
int main()
{
	cin>>a.year>>a.month>>a.day;
	cout<<days(a)<<endl;
	return 0;
}