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: 1887 - 5213 + 516 - 4107 - 7681 - 125 - 1788 + 124 - 1460
Example Output: 21621

Example Input: 4483 + 3021 - 5582 - 3918 + 8842
Example Output: 2120

Example Input: 9184 - 9939 - 7137 - 8236 + 641
Example Output:
33855