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: 1231 + 6657 - 8263
Example Output: 2837

Example Input: 1943 + 6084 + 8719 + 2400 + 8595 - 7077 + 1264
Example Output: -18042

Example Input: 3499 - 2496 - 8559 + 8652 + 3011
Example Output:
2891