str = gets

ans = 0

(0..str.length-2).each {|i|
    left = str[0..i]
    right = str[(i+1)..(str.length-2)]
    expr = right + left

    if expr[0] == '+' || expr[-1] == '+'
        next
    end

    if expr[0] == '-' || expr[-1] == '-'
        next
    end

    val = eval(expr)

    if val > ans
        ans = val
    end
}

puts ans