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: 8979 - 7069 - 6830 + 3597 + 315 - 526
Example Output: 19492

Example Input: 6820 - 387 + 8290 - 9203 - 9292 + 9249 - 3079
Example Output: 11242

Example Input: 2367 - 4658 + 2677 + 221
Example Output:
4127