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

char s[100001], *p;

long long eval();
long long termen();
long long factor();

int main()
{
    fin.getline(s, 100001);
    p = s;
    fout << eval();
    return 0;
}


long long eval()
{
    long long n = termen();
    while(*p == '+' || *p == '-')
    {
        if(*p == '+')
        {
            p++;
            n += termen();
            break;
        }
        else if(*p == '-')
        {
            p++;
            n -= termen();
            break;
        }
    }
    return n;
}


long long termen()
{
    long long n = factor();
    while(*p == '*' || *p == '/')
    {
        if(*p == '*')
        {
            p++;
            n *= factor();
            break;
        }
        else if(*p == '/')
        {
            p++;
            n /= factor();
            break;
        }
    }
    return n;
}

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