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: 6439 - 6685 + 6156 - 3314 + 6845 - 6872
Example Output: 10309

Example Input: 5342 - 6456 - 9929 + 3119 - 1242 + 314
Example Output: 19536

Example Input: 3748 + 5125 + 220 + 2876
Example Output:
-4473