#include <bits/stdc++.h>

using namespace std;
ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");
const int N=1e5;
char s[N+1];
int p;
int expresie();
int termen();
int factor ();
int main()
{
fin>>s;
fout <<expresie();


    return 0;
}
int expresie()
{
    int sum=termen();
    while (s[p]=='+' || s[p]=='-')
    {
        if (s[p]=='+')
        {
            p++;
            sum+=termen();
        }
        else
        {
            p++;
            sum-=termen();
        }

    }
    return sum;
}
int termen ()
{
    int prod =factor();
    while (s[p]=='*' || s[p]=='/')
    {
        if (s[p]=='*')
        {
            p++;
            prod*=factor();
        }
        else
        {
            p++;
            prod/=factor();
        }
    }
    return prod;
}
int factor()
{
    int val=0,semn=1;
    while (s[p]=='-')
    {
        semn=(-semn);
        p++;
    }
    if (s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while ('0'<=s[p] && s[p]<='9')
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}