#include <iostream>
#include <fstream>
#include <cstring>

#define lim 100001

using namespace std;

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

char s[lim],*p=s;

int termen();
int factor();

int eval()
{
    int r=termen();
    while(*p=='+'||*p=='-')
    {
        switch(*p)
        {
        case '+':
            p++;
            r+=termen();
            break;
        case '-':
            p++;
            r-=termen();
            break;
        }
    }
    return r;
}

int termen()
{
    int r=factor();
    while(*p=='*'||*p=='/')
    {
        switch(*p)
        {
        case '*':
            p++;
            r*=factor();
            break;
        case '/':
            p++;
            r/=factor();
            break;
        }
    }
    return r;
}

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

int main()
{
    fin.getline(s,lim);
    fout<<eval();
    return 0;
}