#include <fstream>
#include <cstring>

using namespace std;

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

int i,n;
char c[100005];

int expresie();
int factor();
int termen();

int main()
{
    fin >> c;
    n=strlen(c);
    i=0;
    fout << expresie();

    return 0;
}

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

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

int termen()
{
    int s=0;
    if (c[i]=='(')
    {
        i++;
        s=expresie();
        i++;
    }
    else
    {
        while (c[i]>='0' && c[i]<'9')
        {
            s=s*10+(c[i]-'0');
            i++;
        }
    }
    return s;
}