#include <bits/stdc++.h>
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char s[100001], *p = s;
int termen();
int factor();
int eval()
{
    int r = termen();
    while (*p =='+' || *p == '-')
    {
        switch(*p)
        {
            case '+':
                ++p;
                r+=termen();
                break;
            case '-':
                ++p;
                r-=termen();
                break;
        }
    }
    return r;
}
int termen()
{
    int r = factor();
    while(*p == '*' || *p == '/')
    {
        switch(*p)
        {
            case '*':
                ++p;
                r*=factor();
                break;
            case '/':
                ++p;
                r/=factor();
                break;
        }
    }
    return r;
}
int factor()
{
    int r = 0;
    if (*p == '(')
    {
        ++p;
        r = eval();
        ++p;
    }
    else
    {
        while(*p >= '0' && *p <= '9')
        {
            r = r*10+*p-48;
            ++p;
        }
    }
    return r;
}
int main()
{
    fin >> s;
    fout << eval();
    return 0;
}