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:
1320 + 3923 - 1080 - 3521 - 8998 + 4479 - 2559 - 7680

Ex Output:
16756


Ex Input:
8802 - 6452 - 1721 - 4775 + 1838 + 4933 + 9964 - 6909

Ex Output:
11924


Ex Input:
1817 + 4488 + 61 - 9528 + 9857 + 8087

Ex Output:

-11148