#include <fstream>
#include <iostream>
#include <vector>
#include <string>
using namespace std;

const int bracket = 1e9 + 1, times = 1e9 + 2, divide = 1e9 + 3, Minus = 1e9 + 4;

int st[100001], top;

int main()
{
    string s;
    ifstream fin ("evaluare.in");
    fin >> s;
    for (int i = 0; i < s.size(); i++)
        if (s[i] == '+')
            continue;
        else if (s[i] == '(')
            st[++top] = bracket;
        else if (s[i] == '*')
            st[++top] = times;
        else if (s[i] == '/')
            st[++top] = divide;
        else if (s[i] == '-')
            st[++top] = Minus;
        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--;
                }
                top--;
            }
            if (top == 0)
                st[++top] = x;
            else if (st[top] == Minus)
                st[top] = -x;
            else if (st[top] == times) {
                top--;
                st[top] *= x;
            } else if (st[top] == divide) {
                top--;
                st[top] /= x;
            } else st[++top] = x;
        }
    int sum = 0;
    for (int i = 1; i <= top; i++)
        sum += st[i];
    ofstream fout ("evaluare.out");
    fout << sum;
    return 0;
}