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.

Ex Input:
9990 - 8613 - 152 + 4529

Ex Output:
14226


Ex Input:
4624 + 1072 + 9261 + 232 - 7837

Ex Output:
1896


Ex Input:
1161 + 6355 + 56 + 8822 + 3463 - 4485 - 7640 - 3662 - 5513

Ex Output:

3765