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: 3225 + 3857 + 8462 + 230 - 2831 + 8706 + 9484 + 6655 - 2926

Output: -28412


Input: Consider Input: 2510 - 5839 + 9950 + 740

Output: -2341


Input: Consider Input: 4737 - 8536 + 5633 - 1731 + 3807 - 520 + 1622


Output: 4462