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.

Input: Consider Input: 2514 - 3539 - 8491 + 7351 - 1448

Output: 8641


Input: Consider Input: 3428 - 8444 - 2270 - 3241 - 1368 - 8884 - 6840 - 5265

Output: 39740


Input: Consider Input: 826 - 6501 - 223 + 9761 - 8863


Output: 6652