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: 473 - 2568 + 9771 - 2525 + 3277 + 261 - 8230 + 6021

Output: -5534


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

Output: 8641


Input: Consider Input: 6837 - 6976 + 7989 - 7625 + 5083 + 7400 + 1969 + 9622


Output: -10625