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