#include <fstream>
#include <cstring>
using namespace std;
ifstream cin ("evaluare.in");
ofstream cout ("evaluare.out");
const int N = 100001;
char s[N];
int p;
int expresie();
int termen();
int factor();
int expresie ()
{
    int sum = termen ();
    while (s[p]=='+'|| s[p]=='-')
        if (s[p]=='+')
        {
            p++;
            sum+=termen();
        }
        else
        {
            p++;
            sum-=termen ();
        }
    return sum;
}
int termen ()
{
    int prod = factor();
    while (s[p]=='*'|| s[p]=='/')
        if (s[p]=='*')
        {
            p++;
            prod*=factor();
        }
        else
        {
            p++;
            prod/=factor();
        }
    return prod;
}
int factor ()
{
    int val=0, semn=1;
    while (s[p]=='-')
    {
        semn=-semn;
        p++;
    }
    if (s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while ( s[p]>='0'&&s[p]<='9')
    {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}


int main()
{
    cin.getline(s, N);
    cout<<expresie ();
    return 0;
}