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: 4854 - 3903 - 3601 - 6666 - 170 - 3411 - 1306
Example Output: 23911

Example Input: 1471 - 7798 + 6514 + 8053 + 9926
Example Output: -15224

Example Input: 3903 - 9197 + 8948 + 5587 - 7846 - 4139
Example Output:
10550