#include
using namespace std;
int main(){
char ch;
cin>>ch;
if(ch=='+'|| ch=='-'||ch=='*'||ch=='/'||ch=='%'){
int N1,N2;
cin>>N1>>N2;
switch(ch){
case '+' : cout<<N1+N2<<endl;
break;
case '-' : cout<<N1-N2<<endl;
break;
case '*' : cout<<N1*N2<<endl;
break;
case '/' : cout<<N1/N2<<endl;
break;
case '%' : cout<<N1%N2<<endl;
case 'x' :
case 'X' :
break;
default: cout<<"Invalid operation. Try again."<<endl;
break;
}
}
return 0;
}