#include <bits/stdc++.h>
using namespace std;

string s;
int pos = 0;

int calcpm();

// ( n
int calcbn()
{
    if(s[pos] == '(')
    {
        pos++;
        int val = calcpm();
        pos++;
        return val;
    }
    else
    {
        int nr = 0;
        while(s[pos] >= '0' && s[pos] <= '9')
        {
            nr = nr * 10 + (s[pos] - '0');
            pos++;
        }
        return nr;
    }
}

// * /
int calcmd()
{
    int val = calcbn();
    while(s[pos] == '*' or s[pos] == '/')
    {
        if(s[pos] == '*')
        {
            pos++;
            int nvl = calcbn();
            val *= nvl;
        }
        else
        {
            pos++;
            int nvl = calcbn();
            val /= nvl;
        }
    }
    return val;
}

// + -
int calcpm()
{
    int val = calcmd();
    while(s[pos] == '+' or s[pos] == '-')
    {
        if(s[pos] == '+')
        {
            pos++;
            int nvl = calcmd();
            val += nvl;
        }
        else
        {
            pos++;
            int nvl = calcmd();
            val -= nvl;
        }
    }
    return val;
}

int main()
{
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> s;
    cout << calcpm();
}