#include <iostream>
#include <cstdio>
#include <stack>
#include <string>

#define MAXINT 1000000000

using namespace std;

string s;
int i = 0;
int res = 0;
stack<int> seq;

int open_bracket = MAXINT + int('(');
int closed_bracket = MAXINT + int(')');
int plus_sign = MAXINT + int('+');
int minus_sign = MAXINT + int('-');
int multiplication_sign = MAXINT + int('*');
int division_sign = MAXINT + int('/');

int sum_to_closed_bracket()
{
	int sum = 0;
	int nr;
	while (seq.top() != open_bracket)
	{
		nr = seq.top();
		seq.pop();
		if (seq.top() == plus_sign)
		{
			seq.pop();
			sum += nr;
		}
		if (seq.top() == minus_sign)
		{
			seq.pop();
			sum -= nr;
			nr = 0;
		}
	}
	return sum + nr;
}

void close_bracket()
{
	int sum = sum_to_closed_bracket();

	seq.pop();

	if (seq.top() == multiplication_sign)
	{
		seq.pop();
		int multiplier = seq.top();
		seq.pop();
		sum = multiplier * sum;
	}
	if (seq.top() == division_sign)
	{
		seq.pop();
		int dividend = seq.top();
		seq.pop();
		sum = dividend / sum;
	}
	seq.push(sum);
}

void readNumber()
{
	int nr = 0;
	while (i < s.length() && s[i] >= '0' && s[i] <= '9')
		nr = nr * 10 + int(s[i++] - '0');
	if (seq.top() == multiplication_sign)
	{
		seq.pop();
		int previous = seq.top();
		seq.pop();
		seq.push(previous * nr);
	}
	else
	{
		if (seq.top() == division_sign)
		{
			seq.pop();
			int previous = seq.top();
			seq.pop();
			seq.push(previous / nr);
		}
		else
			seq.push(nr);
	}
	// will increment i in main loop, and it has to point at the sign after the number
	--i;
}

int main() {
	freopen("evaluare.in", "r", stdin);
	freopen("evaluare.out", "w", stdin);
	cin >> s;
	seq.push(open_bracket);

	while (i < s.length())
	{
		switch (s[i])
		{
		case ')':
			close_bracket();
			break;
		case '(':
			seq.push(open_bracket);
			break;
		case '+':
			seq.push(plus_sign);
			break;
		case '-':
			seq.push(minus_sign);
			break;
		case '*':
			seq.push(multiplication_sign);
			break;
		case '/':
			seq.push(division_sign);
			break;
		default:
			readNumber();
			break;
		}
		++i;
	}

	cout << sum_to_closed_bracket();

	return 0;
}