import std.algorithm, std.array, std.container, std.range, std.bitmanip;
import std.numeric, std.math, std.bigint, std.random;
import std.string, std.conv, std.stdio, std.typecons;

void main()
{
  auto s = readln.chomp;

  auto r = iota(s.length)
    .map!(i => s[i..$] ~ s[0..i])
    .filter!(s => s.front != '+' && s.front != '-' && s.back != '+' && s.back != '-')
    .map!(calc)
    .reduce!(max);

  writeln(r);
}

int calc(string s)
{
  auto acc = 0, buf = 0;
  char op;

  foreach (c; s) {
    if (c >= '0' && c <= '9') {
      buf = buf * 10 + (c - '0');
    } else if (c == '+' || c == '-') {
      applyOp(acc, buf, op);
      op = c;
    }
  }
  applyOp(acc, buf, op);

  return acc;
}

void applyOp(ref int acc, ref int buf, ref char op)
{
  if (op == '+') {
    acc = acc + buf;
  } else if (op == '-') {
    acc = acc - buf;
  } else {
    acc = buf;
  }

  buf = 0;
}