import java.io.IOException;
import java.io.InputStream;
import java.util.NoSuchElementException;

public class Main {
	public static void main(String args[]) {
		FastScanner scanner = new FastScanner();
		String s=scanner.next();
		int max=eval(s);
		for(int i=1;i<s.length();i++) {
			String tmp1=s.substring(0, i);
			String tmp2=s.substring(i,s.length());
			String after=tmp2+tmp1;
			int tmp=0;
			if(check(after)) {
				tmp=eval(after);
			}
			max=Math.max(max, tmp);
		}
		System.out.println(max);
	}

	private static int eval(String after) {
		String x[] = after.split("[+-]");
		String op[] = after.split("[0-9]+");
		int sum = 0;
		if (op[0].equals("")) {
			sum = Integer.parseInt(x[0]);
			for (int i = 1; i < x.length; i++) {
				if (op[i].equals("+")) {
					sum += Integer.parseInt(x[i]);
				} else {
					sum -= Integer.parseInt(x[i]);
				}
			}
		}else {
			sum = Integer.parseInt(x[1])*-1;
			for (int i = 2; i < x.length; i++) {
				if (op[i-1].equals("+")) {
					sum += Integer.parseInt(x[i]);
				} else {
					sum -= Integer.parseInt(x[i]);
				}
			}
		}
		return sum;
	}

	private static boolean check(String after) {
		if (after.charAt(0) == '+' || after.charAt(after.length() - 1) == '+'
				|| after.charAt(after.length() - 1) == '-') {
			return false;
		}
		return true;
	}
}

class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
}