#include <bits/stdc++.h>

using namespace std;

int produs();
int exp ();
int i;
string sir;
ifstream f("evaluare.in");
ofstream g("evaluare.out");

int aduna()
{
    int rez = produs();
    while(sir[i]=='+'||sir[i]=='-')
    {
        if(sir[i]=='+')
        {
            i++;
            rez=rez+produs();
        }
        else
        {
            i++;
            rez=rez-produs();
        }
    }
    return rez;
}

int produs()
{
    int rez = exp();
    while (sir[i]=='*'||sir[i]=='/')
    {
        if(sir[i]=='*')
        {
            i++;
            rez=rez*exp();
        }
        else
        {
            i++;
            rez=rez/exp();
        }
    }
    return rez;
}

int exp()
{
    int rez=0;
    if(sir[i]=='(')
    {
        i++;
        rez=aduna();
        i++;
    }
    else
    {
        while(sir[i]>='0'&&sir[i]<='9')
        {
            rez=rez*10 + (sir[i]-'0');
            i++;
        }
    }
    return rez;
}

int main()
{
    f>>sir;
    g<<aduna();
    f.close();
    g.close();
    return 0;
}