#include <fstream>
using namespace std;
ifstream fin("grader_test2.in");
ofstream fout("evaluare.out");

char s[100001], *p = s;

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

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


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


        }
    }
    return n;
}


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

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