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: 2875 - 138 + 917 + 4037 - 6642
Example Output: 4701

Example Input: 242 - 3824 + 6718 - 4276 + 8975
Example Output: -7351

Example Input: 2715 - 1808 + 4245 - 152 - 9815 + 9097 - 9636 - 8140
Example Output:
18924