#include <iostream>
#include<fstream>

using namespace std;

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

const int N=100000;
char s[N+1];
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=prod*factor();
        }
        else
        {
            p++;
            prod=prod/factor();
        }
    }
    return prod;
}
int factor()
{
    int semn=1, val=0;
    while(s[p]=='-')
    {
        p++;
        semn=-semn;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val=val*10 + (s[p]-'0');
        p++;
    }
    return semn*val;
}

int main()
{
    in>>s;
    out<<expresie();
    return 0;
}