#include <bits/stdc++.h>

using namespace std;

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

char s[100005];
int i;
int Termen();
int Factor();

int Eval()
{
    int x = Termen();
    while (s[i] == '+' or s[i] == '-')
    {
        if (s[i] == '+')
        {
            i++;
            x += Termen();
            break;
        }
        if (s[i] == '-')
        {
            i++;
            x -= Termen();
            break;
        }
    }
    return x;
}

int Termen()
{
    int x = Factor();
    while (s[i] == '*' or s[i] == '/')
    {
        if(s[i]=='*')
        {
            i++;
            x *= Factor();
            break;
        }
        if(s[i]=='/')
        {
            i++;
            x /= Factor();
            break;
        }
    }
    return x;
}

int Factor()
{
    int x;
    if (s[i] == '(')
    {
        i++;
        x = Eval();
        i++;
    }
    else
    {
        x = 0;
        while (isdigit(s[i]))
        {
            x = x * 10 + s[i] - '0';
            i++;
        }
    }
    return x;
}

int main()
{
    i = 1;
    fin >> (s + 1);
    fout << Eval();
    return 0;
}