#include <fstream>

using namespace std;

const int Max = 100005;
char s[Max], *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 factor()
{
    long r=0;
    if(*p=='(')
    {
        ++p;
        r = eval();
        ++p;
    }
    else
    {
        while(*p>='0'&&*p<='9')
        {
            r = r*10 + *p - '0';
            p++;
        }
    }
    return r;
}

long termen()
{
    long r = factor();
    while( *p == '*' || *p == '/')
    {
        switch(*p)
        {
            case '*':
                ++p;
                r *= factor();
                break;
            case '/':
                ++p;
                r /= factor();
                break;
        }
    }
    return r;
}void citire()
{
    ifstream f("evaluare.in");
    f>>s;
    f.close();
}

void afisare()
{
    ofstream h("evaluare.out");
    h<<eval();
    h.close();
}

int main()
{
    citire();
    afisare();
    return 0;
}