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: 573 - 2172 + 3067 + 6526 - 4690
Example Output: -2158

Example Input: 9118 + 5545 - 3160 + 3672 - 3568 + 5997 + 205 + 7095
Example Output: -6668

Example Input: 2857 + 4036 + 5166 + 5888 + 6960 + 965 - 5198 + 3990 - 4603
Example Output:
-14347