#include <bits/stdc++.h>
using namespace std;

int main(){
	int a,b;
	char c;
	cin>>a>>b>>c;
	if(c=='/'&&b==0){
		cout<<"Divided by zero!"<<endl;
		return 0;
	}
	switch(c){
		case '+':
			cout<<a+b<<endl;
			break;
		case '-':
			cout<<a-b<<endl;
			break;
		case '*':
			cout<<a*b<<endl;
			break;
		case '/':
			cout<<floor(a*1.0/b)<<endl;
			break;
		default:
			cout<<"Divided by zero!"<<endl;
	}
	return 0;
}