#include <bits/stdc++.h>
using namespace std;

ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

char ec[100005], *p = ec;

int Termen();
int Factor();
int Eval()
{
    int r = Termen();
    while(*p == '+' || *p == '-')
        switch(*p)
        {
            case '+': p++; r += Termen(); break;
            case '-': p++; r -= Termen(); break;
        }
    return r;
}
int Termen()
{
    int r = Factor();
    while(*p == '*' || *p == '/')
        switch(*p)
        {
            case '*': p++; r *= Factor(); break;
            case '/': p++; r /= Factor(); break;
        }
    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 >> ec;
    fout << Eval() << "\n";
    fin.close();
    fout.close();
    return 0;
}