#include<iostream>
#include<fstream>
#include<cstring>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
const int N=1000001;
char s[N];
int p;
int expresie();
int termen();
int factor();
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]=='-')
    {
        p++;
        semn=-semn;
    }
    if (s[p]=='(')
    {
        p++;//trece peste (
        val=expresie();
        p++;//trece peste )
        return semn*val;
    }
    while (isdigit(s[p]))
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}
int main()
{
    in >> s;
    out << expresie();
    return 0;
}