#include <iostream> using namespace std; int main() { int a; cin>>a; switch(a){ case 2: cout<<"29";break; case 4: cout<<"30";break; case 6: cout<<"30";break; case 9: cout<<"30";break; case 11: cout<<"30";break; case 1: cout<<"31";break; case 3: cout<<"31";break; case 5: cout<<"31";break; case 7: cout<<"31";break; case 8: cout<<"31";break; case 10: cout<<"31";break; case 12: cout<<"31";break; default: cout<<"Invalid"; break; } }