#include<stdio.h>
using namespace std;
const int N = 100005;
char s[N];
int p = 1;
int termen();
int expresie();
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 = prod * factor();
        }
        else
        {
            p++;
            prod = 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;
    }
    while (s[p] >= '0' && s[p] <= '9')
        val = val * 10 + (s[p++] - '0');
    return semn * val;
}
int main ()
{
    FILE *in, *out;
    in = fopen ("evaluare.in", "r");
    out = fopen ("evaluare.out", "w");
    int i;
    char x;
    i = 0;
    while (x != '\n')
    {
        x = fgetc (in);
        s[++i] = x;
    }
    i--;
    fprintf (out, "%d", expresie());
    return 0;
}