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: 6120 - 9271 - 7167 + 6916 - 2510 + 7854 - 7909 - 1960 - 3775
Example Output: 23942

Example Input: 6570 + 2902 + 9219 - 6971 + 6886 + 765
Example Output: -6231

Example Input: 2464 + 160 - 44 + 1985 - 1579 + 8320 + 7933 - 9158 + 1635
Example Output:
-6788