#include      <iostream>
#include      <fstream>
#include      <algorithm>
#include      <string>

using namespace std;

ifstream in("evaluare.in");
ofstream out("evaluare.out");

string e;
int p;

int evaluate();
int term();
int factor();

int evaluate() {
	int x = term();
	while (e[p] == '+' || e[p] == '-') {
		if (e[p] == '+')
			p++, x += term();
		else
			p++, x -= term();
	}
	return x;
}

int term() {
	int x = factor();
	while (e[p] == '*' || e[p] == '/') {
		if (e[p] == '*')
			p++, x *= factor();
		else
			p++, x /= factor();
	}
	return x;
}

int factor() {
	int x = 0;
	if (e[p] == '(') {
		p++;
		x = evaluate();
		p++;
	}
	else {
		x = 0;
		while (e[p] >= '0' && e[p] <= '9') {
			x = x * 10 + e[p] - '0';
			p++;
		}
	}
	return x;
}

int main() {
	ios_base::sync_with_stdio(false);
	in.tie(NULL), out.tie(NULL);

	in >> e;
	out << evaluate();

	return 0;
}