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: 1540 + 6977 + 9400 - 5524 - 1970 + 8397 - 6006 + 3183
Example Output: -12917

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

Example Input: 4593 - 5463 + 4320 - 2097 - 2759 - 9443
Example Output:
20035