#include
using namespace std;
int main() {
char ch;
int n1,n2;
cin>>ch;
while(ch!=‘x’ && ch!=‘X’) {
if(ch==’+’){
cin>>n1;
cin>>n2;
cout<<n1+n2<<endl;
}
else if(ch=='-'){
cin>>n1;
cin>>n2;
cout<<n1-n2<<endl;
}
else if(ch=='*'){
cin>>n1;
cin>>n2;
cout<<n1*n2<<endl;
}
else if(ch=='/'){
cin>>n1;
cin>>n2;
cout<<n1/n2<<endl;
}
else if(ch=='%'){
cin>>n1;
cin>>n2;
cout<<n1%n2<<endl;
}
else{
cout<<"invalid operation, try again"<<endl;
}
cin>>ch;
}
return 0;
}