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:
7371 - 9025 + 8352 - 9201 - 9297 - 3561 + 8576

Ex Output:
21527


Ex Input:
9751 - 3599 + 7441 - 2176 + 2662 + 9430 + 8207 + 5927 - 8529

Ex Output:
-9612


Ex Input:
7016 + 386 - 3305 + 5816 + 2273

Ex Output:

1846