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.

Example Input: 694 + 4432 - 9053
Example Output: 5315

Example Input: 3421 - 71 + 7643 - 8661 + 520 - 6536 + 9411
Example Output: 1115

Example Input: 2474 - 6590 - 6410 - 9349 + 2453 - 893 + 4482
Example Output:
18781