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: 8602 - 1293 - 8063 - 4529 + 453 - 6407
Example Output: 28441

Example Input: 7457 - 9732 + 1691 + 2450 + 16 + 1610 + 1729
Example Output: 9693

Example Input: 3455 - 7428 + 8056 - 5542 - 4359 + 2897
Example Output:
9831