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: 9713 + 8053 - 1782 + 6126 + 5918 + 968 - 2071 - 879 + 558
Example Output: -7178

Example Input: 2181 + 397 + 8824 - 2945 + 612 + 9971 + 1036 - 7693
Example Output: -8021

Example Input: 4053 + 3713 - 207
Example Output:
547