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: 9001 + 6216 - 1478 + 5475 - 8693 - 3911 - 319 + 4768 - 320
Example Output: 7263

Example Input: 8988 + 9565 + 4047 - 1723 + 7160 - 8838 + 5611 + 7126
Example Output: -13960

Example Input: 6500 - 5345 - 8827 + 7073 + 6936
Example Output:
6663