#include <iostream>
#include <fstream>
#include <cstring>

using namespace std;

const int MAXN = 100041;
char sir[MAXN];

struct Nod
{
    int val;
    char op;
    Nod *st, *dr;
    Nod(char _op, Nod* _st, Nod* _dr) {
        op = _op;
        st = _st;
        dr = _dr;
    }
};

Nod* construct(int st, int dr, int level)
{
    int par = 0;
    if (level == 0) {
        for (int i = dr; i >= st; i--)
        if (sir[i] == ')') par++;
        else if (sir[i] == '(') par--;
        else if (par == 0 && (sir[i] == '+' || sir[i] == '-'))
            return new Nod(sir[i], construct(st, i-1, level), construct(i+1, dr, level+1));
    }
    for (int i = dr; i >= st; i--)
        if (sir[i] == ')') par++;
        else if (sir[i] == '(') par--;
        else if (par == 0 && (sir[i] == '*' || sir[i] == '/'))
            return new Nod(sir[i], construct(st, i-1, 1), construct(i+1, dr, 1));
    if (sir[st] == '(')
        return construct(st+1, dr-1, 0);
    int nr = 0;
    for (int i = st; i <= dr; i++)
        nr = nr*10 + sir[i] - '0';
    Nod* rez = new Nod('?', nullptr, nullptr);
    rez->val = nr;
    return rez;
}

int eval(Nod* root)
{
    if (root->op == '?')
        return root->val;
    int x = eval(root->st);
    int y = eval(root->dr);
    switch (root->op) {
        case '+': return x+y;
        case '-': return x-y;
        case '*': return x*y;
        case '/': return x/y;
    }
}

int main()
{
    ifstream fin("evaluare.in");
    ofstream fout("evaluare.out");

    fin >> sir;
    Nod* root = construct(0, strlen(sir)-1, 0);
    fout << eval(root);


    return 0;
}