#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>
#include<limits>

using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<ll, string> pls;

int main()
{
	int x, y;
	char op;
	cin >> x >> op >> y;
	if (op == '+')
		cout << x - y << endl;
	else if (op == '-')
		cout << x + y << endl;
	return 0;
}