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: 1259 - 2367 + 9919 + 7196 + 4121
Example Output: -17610

Example Input: 8354 + 2602 + 1315
Example Output: 4437

Example Input: 7074 - 5715 + 2470
Example Output:
10319