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: 1260 + 6532 + 3162 + 7255

Output: -15689


Input: Consider Input: 8671 + 9945 - 8465 - 5276 + 1447

Output: 11020


Input: Consider Input: 589 - 1249 - 4504


Output: 6342