#include <bits/stdc++.h>

using namespace std;

string v;
int i;
int numar();
int inm_imp();
int evaluare()
{
    int nr = inm_imp();
    while (v[i] == '+' || v[i] == '-')
    {
        if (v[i++] == '+')
            nr += inm_imp();
        else
            nr -= inm_imp();
    }
    return nr;
}
int numar()
{
    int nr = 0;
    if ( v [i] == '(')
    {
        i++;
        nr = evaluare();
        i++;
    }
    else
        while(v[i] >= '0'&& v[i] <= '9')
        {
            nr = nr * 10 + (v[i] - '0');
            i++;
        }
    return nr;
}
int inm_imp()
{
    int nr = numar();
    while (v[i] == '*' || v[i] == '/')
    {
        if (v[i++] == '*')
            nr *= numar();
        else
            nr /= numar();
    }
    return nr;
}
int main()
{
    ifstream fin("evaluare.in");
    ofstream fout("evaluare.out");
    fin >> v;
    fout << evaluare();
    return 0;
}