Перечислите все возможные "входы" и "выходы" смартфона

#include <iostream>
using namespace std;

int main() {
   int month, day;
   string a[13] = {"Kozerog","Vodoley","Ryby","Oven","Telec","Bliznecy",
       "Rak","Lev","Deva","Vesy","Skorpion","Strelec","Kozerog"};
   int mes[12] = {31,29,31,30,31,30,31,30,31,31,30,31};
   int bound[12] = {21,19,21,20,21,22,23,23,23,23,23,22};
   cout << "Programma opredeleniya znaka zodiaka" << endl;
   cout << "Vvedite mecyac: ";
   cin >> month;
   cout << "Vvedite den: ";
   cin >> day;
   if ((month<1 || month>12) || (day<1 || day>mes[month-1])) 
      cout<<"invalid input"<<endl;
   else {
         if (day<bound[month-1]) cout<<a[month-1]<<endl;
         else cout<<a[month]<<endl;
   }         
   system("pause");
   return 0;
}