#include <bits/stdc++.h> using namespace std; int main(){ int a,b; string c;
cin >> a >> b >> c; if(c == "+"){ cout << a+b; }else if(c == "-"){ cout << a-b;
}else if(c == "*"){ cout << a*b; }else if(c == "/"){ if(b != 0){ cout << a/b; }else{
cout << "Divided by zero!"; } }else{ cout << "Invalid operator!"; } return 0; }