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: 5450 - 7077 + 4877
Example Output: 7650

Example Input: 3936 + 9169 - 6448 + 1974 + 6101 + 5124
Example Output:
-11984