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

int main()
{
	
	int a,b;
	char n;
	cin>>a>>b>>n;
	switch(n)
	{
		case '+':
		cout<<a+b;	
		break;
		case '-':
		cout<<a-b;	
		break;
		case '*':
		cout<<a*b;	
		break;
		case '/':
		cout<<a/b;	
		break;
		case '%':
		cout<<a%b;	
		break;	
		default:
		cout<<"wrong";	
	}
	return 0;
}