#include <bits/stdc++.h>

using namespace std;

const int nmax = 1e5 + 10;

char *p, s[nmax];

int getnr()
{
    int x = 0;
    while (isdigit(*p))
        x = x * 10 + *p - '0',
        p++;
    p--;
    return x;
}

int bagaeval();

int factor()
{
    int ret;

    if (*p == '(') p++, ret = bagaeval();
    else ret = getnr();

    p++;
    return ret;
}

int termen()
{
    int act = factor();
    while (*p == '*' || *p == '/')
        if (*p == '*') p++, act *= factor();
        else p++, act /= factor();

    return act;
}

int bagaeval()
{
    int act = termen();
    while (*p == '+' || *p == '-')
        if (*p == '+') p++, act += termen();
        else p++, act -= termen();

    return act;
}

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);

    gets(s);

    p = s;

    printf("%d\n", bagaeval());

    return 0;
}