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: 5610 - 3034 + 9312 + 7337 + 2731 + 8581 + 5926 - 2102 + 2137
Example Output: -25278

Example Input: 5305 + 2391 - 9339 - 8819 + 2784 - 2103 - 4613 - 8856
Example Output:
33860