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: 2167 - 8760 - 4771 - 8633 + 7929 + 9784 + 6892
Example Output: -274

Example Input: 2443 + 7109 + 4711
Example Output: -9377

Example Input: 7252 - 8553 - 4853 + 6748 - 3750
Example Output:
17660