#include <iostream>
#include <fstream>
#include <cctype>
#define fin "evaluare.in"
#define fou "evaluare.out"
#define Max 100001
using namespace std;
ifstream t1(fin);
ofstream t2(fou);
char s[Max],*p=s;

long factor();
long termen();

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

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

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


int main()
{
    t1.get(s,Max);
    t2<<eval();
    t1.close();
    t2.close();
    return 0;
}