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: 4101 + 2536 - 502

Output: 2067


Input: Consider Input: 9852 - 24 - 2468 + 5798 + 6384

Output: 162


Input: Consider Input: 3004 - 6551 - 4684 + 574


Output: 13665