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: 5321 - 5114 + 7476 + 1962
Example Output: 997

Example Input: 1256 - 3248 - 3709 - 3019
Example Output: 11232

Example Input: 4943 + 4787 - 6915 + 1326 + 2107
Example Output:
3638