#include <fstream>
#include <queue>
#include <iostream>
#include <bitset>
using namespace std;

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

string s;
const int bracket = 1e9 + 1, divide = 1e9 + 2, times = 1e9 + 3, Minus = 1e9 + 4;
int st[100001],top;
int main()
{
    fin >> s;
    for (int i = 0; i < s.size(); i++)
    {
        if (s[i] == '+')
            continue;
        else if (s[i] == '-')
            st[++top] = Minus;
        else if (s[i] == '*')
            st[++top] = times;
        else if (s[i] == '/')
            st[++top] = divide;
        else if (s[i] == '(')
            st[++top] = bracket;
        else
        {
            int x = 0;
            if (isdigit(s[i]))
            {
                while (isdigit(s[i]))
                    x = x*10 + (s[i++] - '0');
                i--;
            }
            else
            {
                while (st[top] != bracket)
                    x += st[top--];
                top--;
            }
            if (top == 0)
                st[++top] = x;
            else if (st[top] == Minus)
                st[top] = -x;
            else if (st[top] == times)
            {
                st[top - 1] *= x;
                top--;
            }
            else if (st[top] == divide)
            {
                st[top - 1] /= x;
                top--;

            }
            else
                st[++top] = x;
        }
    }
    int s = 0;
    for (int i = 1; i <= top; i++)
        s += st[i];
    fout << s;
    return 0;
}