#include <bits/stdc++.h>
#define NN 100005
using namespace std;
ifstream fin ("evaluare.in");
ofstream fout ("evaluare.out");

string s;
int i;

int expresie();
int termen();
int fact();

int expresie()
{
    int val = termen();
    while(s[i] == '+' || s[i] == '-')
    {
        i++;
        if(s[i-1] == '+')
            val += termen();
        else
            val -= termen();
    }
    return val;
}

int termen()
{
    int val = fact();
    while(s[i] == '*' || s[i] == '/')
    {
        i++;
        if(s[i-1] == '*')
            val *= fact();
        else
            val /= fact();
    }
    return val;
}

int fact()
{
    int val = 0;
    int semn = 1;
    while(s[i] == '-')
    {
        i++;
        semn *= (-1);
    }
    if(s[i] == '(')
    {
        i++;
        val = expresie();
        i++;
        return val;
    }
    while(s[i] >= '0' && s[i] <= '9')
    {
        val = val * 10 + s[i] - '0';
        i++;
    }
    return val;
}

int main()
{
    fin >> s;
    fout << expresie();
    return 0;
}