#include <cstdio>
#include <cstring>

char s[100010];

int termen ();
int factor ();
int numar ();

int poz;

int expresie () {
    int ANS = termen ();
    while (s[poz] == '+' || s[poz] == '-') {
        if (s[poz] == '+') {
            poz++;
            ANS += termen ();
        }
        else {
            poz++;
            ANS -= termen ();
        }
    }
    return ANS;
}

int termen () {
    int ANS = factor ();
    while (s[poz] == '*' || s[poz] == '/') {
        if (s[poz] == '*') {
            poz++;
            ANS *= factor();
        }
        else {
            poz++;
            ANS /= factor();
        }
    }
    return ANS;
}

int factor () {
    int ANS;
    if (s[poz] == '(') {
        poz++;
        ANS = expresie ();
        poz ++;
    }
    else {
        ANS = numar ();
    }
    return ANS;
}

int numar () {
    int ANS = 0;
    while (s[poz] >= '0' && s[poz] <= '9') {
        ANS = ANS * 10 + ((s[poz]) - '0');
        poz++;
    }
    return ANS;
}

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

    scanf ("%s", s);

    printf ("%d", expresie ());

    return 0;
}