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: 1788 + 4847 - 9342 - 2397
Example Output: 8680

Example Input: 2297 + 4208 + 9691 - 6995 + 738 + 1245 - 7806
Example Output: 1216

Example Input: 2977 - 4470 - 76 + 164 + 8433 - 2054 - 4953
Example Output:
5933