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: 4274 - 4385 - 2316 - 7783
Example Output: 18758

Example Input: 9489 - 1093 - 1183
Example Output: 11765

Example Input: 8444 + 1488 - 3500 + 1310 - 2108 - 6456 + 7198 - 5405
Example Output:
15917