#include <fstream>
#include <cstring>

using namespace std;

const int N = 1e5 + 1;
char sir[N];
int poz;

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

int expresie()
{
    int sum = termen();
    while (sir[poz] == '+' || sir[poz] == '-')
    {
        if (sir[poz] == '+')
        {
            poz ++;
            sum += termen();
        }
        else
        {
            poz ++;
            sum -= termen();
        }
    }
    return sum;
}
int termen()
{
    int prod = factor();
    while (sir[poz] == '*' || sir[poz] == '/')
    {
        if (sir[poz] == '*')
        {
            poz ++;
            prod *= factor();
        }
        else
        {
            poz ++;
            prod /= factor();
        }
    }
    return prod;
}
int factor()
{
    int val = 0 , semn = 1;
    while (sir[poz] == '-')
    {
        poz ++;
        semn = -semn;
    }
    if (sir[poz] == '(')
    {
        poz ++;
        val = expresie();
        poz ++;
        return semn * val;
    }
    while (isdigit(sir[poz]))
    {
        val = val * 10 + (sir[poz] - '0');
        poz ++;
    }
    return semn * val;
}
int main()
{
    ifstream in("evaluare.in");
    ofstream out("evaluare.out"); 
    
    in.getline(sir , N);
    out << expresie();

    in.close();
    out.close();
    
    return 0;
}