打鱼还是晒网

#include<iostream>
#define Y 1990
using namespace std;
int monthday[] = { 31,28,31,30,31,30,31,31,30,31,30,31 };
bool runyear(int n)
{
if (n % 4 == 0)
return true;
else
return false;
}
int main()
{
int year, month, day, nn, sum = 0;
cin >> nn;
day = nn % 100;
month = nn / 100 % 100;
year = nn / 10000; //cout << year << " " << month << " " << day;
int y = year;
while (year - Y > 0)
{ if (runyear(year))
sum += 366;
else
sum += 365;
year--;
}
int i;
for (i = 1; i < month; i++)
{
if (i == 2 && runyear(y))
sum += 29;
else
sum += monthday[i - 1];
}
sum += day;
if (sum % 5 == 1 || sum % 5 == 2 || sum % 5 == 3)
cout << "打鱼" << endl;
else
cout << "晒网" << endl;
return 0;
}