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: 2537 - 3199 + 5925 + 8172 + 3564 + 8810
Example Output: -20735

Example Input: 4286 + 2085 - 8347
Example Output: 10548

Example Input: 6063 + 9874 + 5939 - 5013 + 791
Example Output:
-5528