#include<iostream> // cin\cout\endl using namespace std; int main(){ int a; cin>>a; switch(a){ case 1:cout<<31<<endl;break; case 2:cout<<28<<endl;break; case 3:cout<<31<<endl;break; case 4:cout<<30<<endl;break; case 5:cout<<31<<endl;break; case 6:cout<<30<<endl;break; case 7:cout<<31<<endl;break; case 8:cout<<31<<endl;break; case 9:cout<<30<<endl;break; case 10:cout<<31<<endl;break; case 11:cout<<30<<endl;break; case 12:cout<<31<<endl;break; } return 0; }