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: 1312 - 814 - 8592 - 4040 - 5158 + 6817
Example Output: 13099

Example Input: 6120 - 9271 - 7167 + 6916 - 2510 + 7854 - 7909 - 1960 - 3775
Example Output: 23942

Example Input: 7537 + 3507 + 9459 - 6244 - 7824 + 4189 - 4694
Example Output:
9144