# include <fstream>
# include <cstring>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
int i,j,VV,S,rez;
char s[100005];
int nr();
int eval ();
int termen ();
int factor();

int eval()
{
    int r=termen ();
    while (s[VV]=='+' || s[VV]=='-')
    {
        ++VV;
        if (s[VV-1]=='+') r+=termen ();
            else r-=termen ();
    }
    return r;
}
int termen()
{
    int r=factor ();
    while (s[VV]=='*' || s[VV]=='/')
    {
        ++VV;
        if (s[VV-1]=='*') r*=factor ();
            else r/=factor ();
    }
    return r;
}
int factor()
{
    int r;
    if (s[VV]=='(') {++VV; r=eval(); ++VV;}
        else if (s[VV]<='9' && s[VV]>='0') r=nr();
    return r;
}
int nr()
{
    int r=0;
    while (s[VV]>='0' && s[VV]<='9')
    {
        r=r*10+(s[VV]-'0');
        ++VV;
    }
    return r;
}
int main ()
{
    f.getline(s,100005);
    g<<eval()<<"\n";
    return 0;
}