#include<iostream>
#include <fstream>
#include <cstring>
using namespace std;
const int DMAX=100000;

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

char s[DMAX+1], *p=s;

int expresie();
int termen();
int factor();

int expresie()
{
    int r=termen();
    while(*p=='+'||*p=='-')
    {
        if(*p=='+')
        {
            ++p;
            r+=termen();
        }
        else
        {
            ++p;
            r-=termen();
        }
    }
    return r;
}

int termen()
{
    int r=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*')
        {
            ++p;
            r*=factor();
        }
        else
        {
            ++p;
            r/=factor();
        }
    }
    return r;
}

int factor()
{
    int r=0;
    if(*p=='(')
    {
        ++p;
        r=expresie();
        ++p;
    }
    else
    {
        while(*p>='0'&&*p<='9')
        {
            r=r*10+*p-'0';
            ++p;
        }
    }
    return r;
}

int main()
{
    fin.getline(s, DMAX+1);
    fout<<expresie();

    fin.close();
    fout.close();
    return 0;
}