#include <fstream>
#include <cstring>
using namespace std;
int expresie(),termen(),factor();
int i,lg;
char s[100100];
int expresie()
{
    int t,nr;
    if(s[i]=='(')
    {
        i++;
        t=termen();
        i++;
    }
    else
    {
        nr=0;
        while('0'<=s[i]&&s[i]<='9')
        {
            nr=nr*10+(s[i]-'0');
            i++;
        }
        t=nr;
    }
    return t;

}
int factor()
{
    int f;
    f=expresie();
    while(i<lg && (s[i]=='*'||s[i]=='/'))
    {
        i++;
        if(s[i-1]=='*')
            f=f*expresie();
        else
            f=f/expresie();
    }
    return f;
}
int termen()
{
    int t;
    t=factor();
    while(i<lg && (s[i]=='+'||s[i]=='-'))
    {
        i++;
        if(s[i-1]=='+')
        {
            t=t+factor();
        }
        else
            t=t-factor();
    }
    return t;
}
int main()
{
    ifstream fin("evaluare.in");
    ofstream fout("evaluare.out");
    fin>>s;
    lg=strlen(s);
    i=0;
    fout<<termen();
    return 0;
}