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:
3477 + 8970 + 2278 - 9906 - 106 - 208 - 1334

Ex Output:
3783


Ex Input:
981 + 3338 + 96 + 3479 + 574 + 2567 + 3009 + 2356 - 4663

Ex Output:
-9775


Ex Input:
5289 - 9903 - 5004 + 1130 - 4763 - 7338 - 5586

Ex Output:

36753