#include <fstream>

using namespace std;

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

const int N = 1e5 + 5;

char s[N];
int p = 0;

int expresie();
int termen();
int factor();

int expresie()
{
    int sum = termen();

    while(s[p] == '+' || s[p] == '-')
    {
        if( s[p] == '+')
        {
            p++;
            sum += termen();
        }
        else
        {
            p++;
            sum -= termen();
        }
    }

    return sum;
}

int termen()
{
    int prod = factor();

    while(s[p] == '*' || s[p] == '/')
    {
        if( s[p] == '*')
        {
            p++;
            prod *= factor();
        }
        else
        {
            p++;
            prod /= factor();
        }
    }

    return prod;
}

int factor()
{
    int val = 0, semn = 1;

    while( s[p] == '-')
    {
        p++;
        semn = (-semn);
    }

    if( s[p] == '(')
    {
        p++;
        val = expresie();

        p++;
        return semn * val;
    }

    ///else implicit
    while( '0' <= s[p] && s[p] <= '9')
    {
        val = 10 * val + (s[p] - '0');
        p++;
    }

    return semn * val;
}

int main()
{
    fin >> s;
    fout << expresie();
    return 0;
}