#include <fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100009], *p = s;
int termen();
int factor();
int eval()
{
    int r = termen();
    while(*p == '+' || *p == '-')
    {
        if(*p == '+') ++p, r += termen();
        else if(*p == '-') ++p, r -= termen();
    }
    return r;
}
int termen()
{
    int r = factor();
    while(*p == '*' || *p == '/')
    {
        if(*p == '*') ++p, r *= factor();
        else if(*p == '/') ++p, r /= factor();
    }
    return r;
}
int factor()
{
    int r = 0;
    if(*p == '(' )
    {
        ++p;
        r = eval();
        ++p;
    }
    else
    {
        while(*p >= '0' && *p <= '9')
        {
            r = r * 10 + (*p - '0');
            ++p;
        }
    }
    return r;
}
int main()
{
    f >> s;
    g << eval();
    g.close();
    return 0;
}