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: 9301 + 1619 - 7459 + 5871 + 2497 + 4093 + 7957 - 1085 - 6698
Example Output: 2506

Example Input: 7202 - 7230 - 3695 + 2434 + 5934 + 5439 + 687 + 2011
Example Output: 1622

Example Input: 5075 - 9437 + 1942 + 1886 - 5070 + 1683 - 7663 - 36
Example Output:
21770