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

using namespace std;

const int bracket = 2e9, times = 2e9 + 1, divide = 2e9 + 2, Minus = 2e9 + 3;

int st[100001], top;
char sir[100001];

int main()
{
    ifstream fin("evaluare.in");
    ofstream fout("evaluare.out");
    fin >> sir;
    for (int i = 0; sir[i];)
    {
        if (sir[i] == '+')
            i++;
        
        else if (sir[i] == '(')
        {
            st[++top] = bracket;
            i++;
        }
        else if (sir[i] == '-')
        {
            st[++top] = Minus;
            i++;
        }
        else if (sir[i] == '*')
        {
            st[++top] = times;
            i++;
        }
        else if (sir[i] == '/')
        {
            st[++top] = divide;
            i++;
        }
        else if (isdigit(sir[i]))
        {
            int x = 0;
            while (isdigit(sir[i]))
                x = x * 10 + sir[i++] - '0';
            if (!top)
                st[++top] = x;
            else if (st[top] == Minus)
                st[top] = -x;
            else if (st[top] == times)
                st[--top] *= x;
            else if (st[top] == divide)
                st[--top] /= x;
            else st[++top] = x;
        }
        else //sir[i] == ')'
        {
            int x = 0;
            while (st[top] != bracket)
                x += st[top--];
            top--;
            if (!top)
                st[++top] = x;
            else if (st[top] == Minus)
                st[top] = -x;
            else if (st[top] == times)
                st[--top] *= x;
            else if (st[top] == divide)
                st[--top] /= x;
            else st[++top] = x;
            i++;
        }
    }
    int s = 0;
    for (int i = 1; i <= top; i++)
        s += st[i];
    fout << s << "\n";
    fout.close();
    return 0;
}

/*

66 + 10 * 5 * 5 / 10 + (-2 * (10 + 30 * 5))

(10 + 20 * 3 - 10 / 5) * 10
(10 60 -2)

*/