#include<bits/stdc++.h>
using namespace std;
int main(){
	int a1,a2;
	char c;
	cin >> a1 >> a2;
	cin >> c;
	if(a2 == 0 && c == '/'){
		cout << "Divided by zero!";
		return 0;
	}
	if (c == '+') cout << a1 + a2;
	if (c == '-') cout << a1 - a2;
	if (c == '*') cout << a1 * a2;
	if (c == '/') cout << a1 / a2;
	if (c != '+' && c != '-' && c != '*' && c != '/') cout << "Invalid operator!";
	return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a1,a2;
	char c;
	cin >> a1 >> a2;
	cin >> c;
	if(a2 == 0 && c == '/'){
		cout << "Divided by zero!";
		return 0;
	}
	if (c == '+') cout << a1 + a2;
	if (c == '-') cout << a1 - a2;
	if (c == '*') cout << a1 * a2;
	if (c == '/') cout << a1 / a2;
	if (c != '+' && c != '-' && c != '*' && c != '/') cout << "Invalid operator!";
	return 0;
}