#include<iostream>
#include<fstream>
#include<string.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
string s;
int i;
int termen();
int factor();
int evaluare()
{
    int x=termen();
    while(s[i]=='+' ||  s[i]=='-')
    {
        if (s[i]=='+')
        {
            i++;
            x=x+termen();
        }
        if (s[i]=='-')
        {
            i++;
            x=x-termen();
        }
    }
    return x;
}

int termen()
{
    int x = factor();
    while (s[i]=='*' || s[i]=='/')
    {
        if(s[i]=='*')
        {
            i++;
            x=x*factor();
        }
        if(s[i]=='/')
        {
            i++;
            x=x/factor();
        }
    }
    return x;
}

int factor()
{
    int x;
    if (s[i]== '(')
    {
        i++;
        x=evaluare();
        i++;
    }
    else
    {
        x=0;
        while(isdigit(s[i]))
        {
            x=x*10+s[i]-'0';
            i++;
        }
    }
    return x;
}

int main()
{
    i=0;
    fin>>s;
    fout<<evaluare();
    return 0;
}