import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        String s = koko.next();
        int n = s.length();
        String[] siki = new String[n];
        int count = 0;
        siki[count++]=s;
        for(int i=1; i<n; i++){
            if(s.charAt(i)!='+'&&s.charAt(i)!='-'){
                if(s.charAt(i-1)!='+'&&s.charAt(i-1)!='-'){
                    StringBuilder rest = new StringBuilder(s);
                    StringBuilder ku = new StringBuilder(s);
                    rest.delete(0, i);
                    String usiro = ku.substring(0, i);
                    rest.append(usiro);
                    siki[count++]=rest.toString();
                }
            }
        }
        int min = 0;
        for(int i=0; i<count; i++){
            min = Math.max(min, keisan(siki[i], 0, -1, '+', 0));
        }
        System.out.println(min);
    }
    static int keisan(String s, int moji, int hugo, char hu, int result){
        if(moji==s.length()-1){
            StringBuilder nu = new StringBuilder(s);
            nu.delete(0, hugo);
            int kazu = Integer.parseInt(nu.toString());
            if(hu=='+'){
                return result+kazu;
            }else{
                return result-kazu;
            }
        }else{
            if(s.charAt(moji)=='+'||s.charAt(moji)=='-'){
                StringBuilder nu = new StringBuilder(s);
                String num = nu.substring(hugo+1, moji);
                int number = Integer.parseInt(num);
                if(hu=='+'){
                    return keisan(s, moji+1, moji, s.charAt(moji), result+number);
                }else{
                    return keisan(s, moji+1, moji, s.charAt(moji), result-number);
                }
            }else{
                return keisan(s, moji+1, hugo, hu, result);
            }
        }
    }
}