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: 1540 + 6977 + 9400 - 5524 - 1970 + 8397 - 6006 + 3183
Example Output: -12917

Example Input: 7240 - 3294 - 2859 + 1798 + 9958 - 6797
Example Output: 8434

Example Input: 7334 - 6936 + 7201 - 3702 - 983 + 4384 + 4449 - 2856
Example Output:
5777