#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>

using namespace std;

int main() {
	int x, y;
	char op;

	scanf("%d%c%d", &x, &op, &y);

	int ans = x + y * (op == '+' ? -1 : 1);
	cout << ans << endl;
	return 0;
}