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:
3284 - 2372 - 6880

Ex Output:
12536

Ex Input:
4325 + 2332 + 1470 - 1881 + 9204 - 2529 - 5460 + 5554

Ex Output:
-4365

Ex Input:
4656 - 918 - 8673 + 4904 + 876

Ex Output:
8467