#include <fstream>

using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char s[100010];
int i;
int expresie();
int termen();
int factor();
int constanta();
int expresie()
{
    int r=termen();
    while(s[i]=='+'||s[i]=='-')
    {
        if (s[i]=='+')
            {
                i++;
        r+=termen();
            }
            else
            {
                i++;
                r-=termen();
            }
    }
    return r;
}
int termen()
{
    int r=factor();
    while (s[i]=='*'||s[i]=='/')
    {
        if (s[i]=='*')
        {
            i++;
            r=r*factor();
        }
        else
        {
             i++;
            r=r/factor();
        }
    }
    return r;
}
int factor()
{
    int r;
    if (s[i]=='(')
    {
        i++;
        r=expresie();
        i++;
    }
    else r=constanta();
    return r;
}
int constanta()
{
    int r=0;
    while (s[i]>='0'&&s[i]<='9')
    {
        r=r*10+(s[i] - '0');
        i++;
    }
    return r;
}
int main()
{
    fin>>s;
i=0;
fout<<expresie();
    return 0;
}