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: 3709 + 206 - 4363 + 3129 + 2506
Example Output: 2231

Example Input: 496 + 5072 + 6259 + 1493 + 4824 + 2052 + 4751 - 8038
Example Output: -15917

Example Input: 4183 + 33 + 6722 + 2018 - 1389 - 6279 + 9645 - 4110 - 1910
Example Output:
-547