#include <bits/stdc++.h>

using namespace std;

int N, p;
string str;

int factor();
int termen();

int eval() {
    int ans = termen();

    while (p < N && (str[p] == '+' || str[p] == '-'))
        if (str[p] == '+') {
            ++ p;
            ans += termen();
        }
        else {
            ++ p;
            ans -= termen();
        }
    return ans;
}

int termen() {
    int ans = factor();

    while (p < N && (str[p] == '*' || str[p] == '/'))
        if (str[p] == '*') {
            ++ p;
            ans *= termen();
        }
        else {
            ++ p;
            ans /= termen();
        }
    return ans;
}

int factor() {
    int ans = 0;
    if (p < N && str[p] == '(') {
        ++ p; //Trecem peste (
        ans = eval();
        ++ p; //Trecem peste )
    }
    else {
        while (p < N && isdigit(str[p])) {
            ans *= 10;
            ans += (str[p] - '0');
            p ++;
        }
    }
    return ans;
}

int main() {
    ifstream cin("evaluare.in");
    ofstream cout("evaluare.out");

    cin >> str;
    N = str.size();
    p = 0;

    cout << eval() << '\n';
    return 0;
}