#include <iostream>
#include <string>

using namespace std;

int getValue(string input, int* offset) {

	int x = 0;
	int flag1 = 1;
	int index = *offset;
	if (input[index] == '+') {
		flag1 = 1;
		++index;
	} else if (input[index] == '-') {
		flag1 = -1;
		++index;
	}

	for (int i = 0; i < input.length(); ++i) {
		if (input[index] < '0' || input[index] > '9') {
			break;
		}
		x *= 10;
		x += input[index] - '0';
		++index;
	}
	x *= flag1;

	*offset = index;

	return x;
}

int main() {
	string input = "";
	cin >> input;

	int offset = 0;
	int x = getValue(input, &offset);
	char op = input[offset];
	++offset;
	int y = getValue(input, &offset);

	if (op == '+') {
		cout << x - y << endl;
	} else {
		cout << x + y << endl;
	}

	getchar();
	getchar();
}