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

#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm>
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 << "Divided by zero!";
			}else{
				cout << a/b;
			}
			break;
		default:
			cout << "Invalid operator!";
	}
	return 0;
}