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

#include using namespace std;

int main() { int a, b; char c; cin >> a >> b >> c;

switch (c) {
    case '+':
        cout << a + b;
        break;
    case '-':
        cout << a - b;
        break;
    case '*':
        cout << a * b;
        break;
    case '/':
        if (b != 0) cout << a / b;
        else cout << "Divided by zero!";
        break;
    default:
        cout << "Invalid operator!";
}

return 0;

}