#include<stdio.h>
using namespace std;
const int N = 100005;
int nr2, c = 1;
char v[N];
int adunare();
int inmultire();
int caracter();
int caracter()
{
    int nr = 0, semn = 1;
    if (v[c] == '-')
    {
        semn = -1;
        c++;
    }
    if (v[c] == '(')
    {
        c++;
        nr = adunare();
        c++;
        return semn * nr;
    }
    while (v[c] >= '0' && v[c] <= '9')
        nr = nr * 10 + (v[c++] - '0');
    return semn * nr;
}
int inmultire ()
{
    int p = caracter();
    while (v[c] == '*' || v[c] == '/')
    {
        if (v[c] == '*')
        {
            c++;
            p *= caracter();
        }
        if (v[c] == '/')
        {
            c++;
            p /= caracter();
        }
    }
    return p;
}
int adunare ()
{
    int s;
    s = inmultire();
    while (v[c] == '+' || v[c] == '-')
    {
        if (v[c] == '+')
        {
            c++;
            s += inmultire ();
        }
        if (v[c] == '-')
        {
            c++;
            s -= inmultire ();
        }
    }
    return s;
}
int main ()
{
    FILE *in, *out;
    in = fopen ("evaluare.in", "r");
    out = fopen ("evaluare.out", "w");
    char x = '0';
    while (x != EOF && x != '\n')
    {
        x = fgetc (in);
        v[++nr2] = x;
    }
    fprintf (out, "%d", adunare());
    return 0;
}