I believe that makes it into an integer, instead of string type.

https://stackoverflow.com/questions/6682997/what-is-the-purpose-of-a-plus-symbol-before-a-variable

ashelkov, your solution is brilliant!

Can you explain, what does mean a '+' character in this record: '+args[i + 1]' ? Thanks!

yeah you right - parentheses i dont count
but u shouldnt count it in this task
u should pass the tests - that what i do in elegant way :)

Hello ! Your solution is not taking into account parentheses : is not working for this example (22 - 2) / 5
In this example the priority is 22 - 2 and than result / 5