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: 509 + 4840 + 5618 + 9163 + 802
Example Output: -19914

Example Input: 1837 - 6362 - 226
Example Output: 8425

Example Input: 1225 - 1679 - 1059 - 6372 - 8514
Example Output:
18849