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: 9885 + 402 + 66 + 4818 + 2654 - 4301 + 2712 + 5842 - 2959
Example Output: 651

Example Input: 8901 - 4785 + 1969 + 5985 + 517 + 5651 + 170
Example Output: -606

Example Input: 6074 - 7224 + 3266
Example Output:
10032