#include <bits/stdc++.h>
#include <cctype>
#define inf 1000000000
using namespace std;

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

char s[100005];
int pos;

int add();
int mult();
int factor();

int add()
{
    int r = mult();
    while (s[pos] == '+' || s[pos] == '-') 
    {
        if(s[pos] == '+')
        {
            pos++;
            r += mult();
        }
        else
        {
            pos++;
            r -= mult();
        }
    }
    return r;
}

int mult()
{
    int r = factor();
    while(s[pos] == '*' || s[pos] == '/')
    {
        if(s[pos] == '*')
        {
            pos++;
            r *= factor();
        }
        else 
        {
            pos++;
            r /= factor();
        }
    }
    return r;
}

int factor()
{
    int r = 0;
    if(s[pos] == '(')
    {
        pos++;
        r = add();
        pos++;
    }
    else 
    {
        while(isdigit(s[pos]))
        {
            r = r * 10 + (s[pos] - '0');
            pos++;
        }
    }
    return r;
}

int main()
{
    fin >> s;
    pos = 0;
    fout << add();
}