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.

Example Input: 2306 - 650 - 3209
Example Output: 6165

Example Input: 6738 - 471 + 8724
Example Output: -1515

Example Input: 1778 - 6170 - 8691
Example Output:
16639