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.

Input: Consider Input: 4624 + 1072 + 9261 + 232 - 7837

Output: 1896


Input: Consider Input: 4325 + 2332 + 1470 - 1881 + 9204 - 2529 - 5460 + 5554

Output: -4365


Input: Consider Input: 9502 + 9602 + 1688 + 4151 + 9395


Output: -15334