#include <fstream>
using namespace std;
ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");
int i;
char s[100002];
int expresie ();
int termen ();
int factor ();
int expresie () ///termen+termen
{
    int r=termen ();
    while (s[i]=='+'||s[i]=='-')
    {
        if (s[i]=='+')
        {
            i++;
            r+=termen ();
        }
        else
        {
            i++;
            r-=termen ();
        }
    }
    return r;
}
int termen () ///factor*factor
{
    int r=factor ();
    while (s[i]=='*'||s[i]=='/')
    {
        if (s[i]=='*')
        {
            i++;
            r*=factor ();
        }
        else
        {
            i++;
            r/=factor ();
        }
    }
    return r;
}
int factor ()
{
    int r;
    if (s[i]=='(')
    {
        i++;
        r=expresie ();
        i++;
    }
    else
    {
        r=0;
        while (s[i]>='0'&&s[i]<='9')
        {
            r=r*10+(s[i]-'0');
            i++;
        }
    }
    return r;
}
int main ()
{
    fin>>s;
    i=0;
    fout<<expresie ();
    return 0;
}