/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <iostream>
#include <fstream>
#include <cstring>
#define Max 100005
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

char s[Max],*p=s;

int eval();

int factor()
{
    int r=0;
    if(*p=='(')
    {
        p++;
        r=eval();
        p++;
    }
    else
    {
    while(isdigit(*p))
    {
        r=r*10+*p-'0';
        p++;
    }
    }
    return r;
}

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


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


int main()
{
    fin>>s;
    fout<<eval();

    return 0;
}