#include <fstream>
using namespace std;
int expresie();
int termen();
int factor();
char s[100100];
int i;
ifstream fin ("evaluare.in");
ofstream fout("evaluare.out");
int expresie()
{
    int r=termen();
    while (s[i]=='+'||s[i]=='-')
    {
        if (s[i]=='+')
        {
            i++;
            r=r+termen();
        }
        else
        {
            i++;
            r=r-termen();
        }
    }
    return r;
}
int termen()
{
    int r=factor();
    while (s[i]=='*'||s[i] =='/')
    {
        if (s[i]=='*')
        {
            i++;
            r=r*factor();
        }
        else
        {
            i++;
            r=r/factor();
        }
    }
    return r;
}
int factor()
{
    int r=0;
    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;
    fout<<expresie();
    return 0;
}