In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Ex Input:
8243 + 5509 - 2652 - 916 - 1636 + 9824

Ex Output:
-1886


Ex Input:
8171 + 8357 + 171 - 3129 - 6929

Ex Output:
9701


Ex Input:
4674 - 7049 + 5835 - 7968 - 8552 + 4184 - 7585 - 9459 - 9266

Ex Output:

44534