#include <fstream>
#define NMax 100010
using namespace std;

char S[NMax], *p;

long termen();
long factor();

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

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

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

int main()
{
    ifstream fin("evaluare.in");
    ofstream fout("evaluare.out");

    fin.get(S,NMax);

    p = S;
    fout << eval();

    fin.close();
    fout.close();
    return 0;
}