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: 4195 + 6940 - 1053 - 4433 + 1540
Example Output: 1201

Example Input: 9301 + 1619 - 7459 + 5871 + 2497 + 4093 + 7957 - 1085 - 6698
Example Output: 2506

Example Input: 4258 - 7058 + 6577 + 3409
Example Output:
1330