#include <cstdio>
#include <cstring>

using namespace std;
char s[100010],*p=s;
int inm_imp();
int eval();
int plus_minus()
{
    int r=inm_imp();
    while(*p=='+' || *p=='-')
    {
        switch(*p)
        {
            case '+':
                ++p;
                r+=inm_imp();
                break;
            case '-':
                ++p;
                r-=inm_imp();
                break;
        }
    }
    return r;
}
int inm_imp()
{
    int r=eval();
    while(*p=='*' || *p=='/')
    {
        switch(*p)
        {
            case '*':
            *p++;
            r*=eval();
            break;
            case '/':
            *p++;
            r/=eval();
            break;
        }
    }
    return r;
}
int eval()
{
    int r=0;
    if(*p=='(')
    {
        ++p;
        r=plus_minus();
        ++p;
    }
    else
    {
        while(*p>='0' && *p<='9')
        {
            r=r*10+*p-'0';
            ++p;
        }
    }
    return r;
}
int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    gets(s);
    printf("%d",plus_minus());
    return 0;
}