#include <bits/stdc++.h>

using namespace std;

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

const int N = 1e5;

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

long termen();
long factor();

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

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

int main()
{
    in >> s;
    out << eval();
    return 0;
}