#include <bits/stdc++.h>

using namespace std;

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

long addOrSub();
long factor();
long term();

string input;
int position ;

long addOrSub()
{
    long result = factor();
    while (position < input.size() && (input[position] == '+' || input[position] == '-'))
    {
        if (input[position] == '+')
        {
            position++;
            result = result + factor();
        }
        else if (input[position] == '-')
        {
            position++;
            result = result - factor();
        }
    }
    return result;
}

long factor()
{
    long result = term();
    while (position < input.size() && (input[position] == '*' || input[position] == '/'))
    {
        if (input[position] == '*')
        {
            position++;
            result = result * term();
        }
        else if (input[position] == '/')
        {
            position++;
            result = result / term();
        }
    }
    return result;
}

long term()
{
    long result = 0;

    if (input[position] == '(')
    {
        position++; /// '('
        result = addOrSub();
        position++; /// ')'
        return result;
    }
    else
    {
        long semn = 1;
        if (input[position] == '-')
        {
            position++;
            semn = -1;
        }

        while (position < input.size() && '0' <= input[position] && input[position] <= '9')
        {
            result = result * 10 + (input[position] - '0');
            position++;
        }
        result *= semn;
    }
    return result;
}

int main()
{
    fin >> input;
    fout << addOrSub();
    return 0;
}