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: 2178 - 6447 + 5843 + 9653 + 4633 - 5887 + 8815 - 6635 + 178
Example Output: -7975

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

Example Input: 6688 + 6012 + 3844 + 6883 + 387 - 1212 + 4257 - 9910 + 7388
Example Output:
-10961