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: 2514 - 3539 - 8491 + 7351 - 1448
Example Output: 8641

Example Input: 9808 + 7071 + 9458 - 8326 - 6406 - 6771 - 1321 + 4712
Example Output: 11391

Example Input: 2729 - 9487 - 6533 - 4643 - 4329 - 7998
Example Output:
35719