#include <iostream>
#include <cstdio>
#include <algorithm>
#include <fstream>

using namespace std;

int i;
string s;

int evaluate();
int term();
int fact();

int fact() {
    int number = 0;
    if (i < s.length() && s[i] == '(') {
        i++;
        number = evaluate();
        i++;
    } else {
        while (i < s.length() && s[i] >= '0' && s[i] <= '9') {
            number = number * 10 + s[i] - '0';
            i++;
        }
    }
    return number;
}

int term() {
    int number = fact();
    while (i < s.length() && (s[i] == '*' || s[i] == '/')) {
        if (s[i] == '*') {
            i++;
            number *= fact();
        } else {
            i++;
            number /= fact();
        }
    }
    return number;
}

int evaluate() {
    int number = term();
    while (i < s.length() && (s[i] == '+' || s[i] == '-')) {
        if (s[i] == '+') {
            i++;
            number += term();
        } else {
            i++;
            number -= term();
        }
    }
    return number;
}

int main() {
    ifstream f("evaluare.in");
    ofstream g("evaluare.out");
    f >> s;
    g << evaluate();
    return 0;
}