#include <stdio.h>

char s[100000];
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;
    }
    while(s[p] >= '0' && s[p] <= '9')
    {
        val = val*10 + s[p] - '0';
        ++p;
    }
    return semn*val;
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    scanf("%s",&s);
    printf("%d\n",expresie());
    return 0;
}