#include
using namespace std;
int main() {
char ch;
int n1,n2;
do{
cin>>ch;
switch(ch){
case β+β:
cin>>n1>>n2;
cout<<(n1+n2)<<endl;
break;
case β-β:
cin>>n1>>n2;
cout<<(n1-n2)<<endl;
break;
case 'β:
cin>>n1>>n2;
cout<<(n1n2)<<endl;
break;
case β/β:
cin>>n1>>n2;
cout<<(n1/n2)<<endl;
break;
case β%β:
cin>>n1>>n2;
cout<<(n1%n2)<<endl;
break;
default:
cout<<βInvalid operation.Try again.β<<endl;
}
}while(ch!=βXβ||ch!=βxβ);
return 0;
}