# include <fstream>
using namespace std;
ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");
char S[100000], *p=S;
int factor();
int termen();
int eval()
{
    int r=termen();
    while (*p=='+' || *p=='-')
    {
        if (*p=='+')
        {
            p++;
            r+=termen();
        }
        else
        {
            p++;
            r-=termen();
        }
    }
    return r;
}
int termen()
{
    int r=factor();
    while (*p=='*' || *p=='/')
    {
        if (*p=='*')
        {
            p++;
            r*=factor();
        }
        else
        {
            p++;
            r/=factor();
        }
    }
    return r;
}
int factor()
{
    int r=0;
    if (*p=='(')
    {
        p++;
        r=eval();
        p++;
    }
    else while (*p>='0' && *p<='9')
    {
        r=r*10+*p-'0';
        p++;
    }
    return r;
}
int main()
{
    fin>>S;
    fout<<eval();
    return 0;
}