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: 3583 - 967 - 3552 + 7898 - 1248 + 6992 - 5291 + 819
Example Output: -1068

Example Input: 8901 - 4785 + 1969 + 5985 + 517 + 5651 + 170
Example Output: -606

Example Input: 7902 - 6524 + 9502
Example Output:
4924