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

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

short Imp(char op)
{
    if (op == '+' || op == '-')
        return 1;
    if (op == '*' || op == '/')
        return 2;
    return 0;
}

int Operatie(int a, int b, char op)
{
    if (op == '+')return a + b;
    if (op == '-')return a - b;
    if (op == '*')return a * b;
    if (op == '/')return a / b;
}

int eval(string s)
{
    stack<int> t;
    stack<char>op;
    for (int i = 0; i < s.size(); i++)
    {
        
        if (s[i] == '(')
            op.push(s[i]);
        else if (isdigit(s[i]))
        {
            int val = 0;
            while (i < s.size() && isdigit(s[i])) {
                val = val * 10 + s[i] - '0';
                i++;
            }
            t.push(val);
            i--;
        }
        else if (s[i] == ')')
        {
            while (!op.empty() && op.top() != '(')
            {
                int val1, val2;
                char ope;
                val2 = t.top();
                t.pop();
                val1 = t.top();
                t.pop();
                ope = op.top();
                op.pop();
                t.push(Operatie(val1, val2, ope));
            }
            if (!op.empty())op.pop();
        }
        else
        {
            /// '+' '-' '/' '*'
            while (!op.empty() && Imp(op.top()) >= Imp(s[i]))
            {
                int val1, val2;
                char ope;
                val2 = t.top();
                t.pop();
                val1 = t.top();
                t.pop();
                ope = op.top();
                op.pop();
                t.push(Operatie(val1, val2, ope));
            }
            op.push(s[i]);
        }
    }

    while (!op.empty())
    {
        int val1, val2;
        char ope;
        val2 = t.top();
        t.pop();
        val1 = t.top();
        t.pop();
        ope = op.top();
        op.pop();
        t.push(Operatie(val1, val2, ope));
        
    }
    return t.top();
}

int main()
{
    string s;
    fin >> s;
    fout << eval(s);
    fin.close();
    fout.close();
    return 0;
}