#include <<iostream>>
using namespace std;
int main(){
int x;
int y;
int a;
int b;
cout <<"Tipe a number"<<endl;//etc.
cin >>x;
cout <<"Tipe another number"<<endl;//etc.
cin >>y;
cout <<"Tipe a number"<<endl;//etc.
cin >>a;
cout <<"Tipe a number"<<endl;//etc.
cin >>b;
cout<<max(x, y, a, b)<<
return 0;
}