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:
9964 + 5009 - 6772 + 8761 + 2075 + 6292 + 4157 + 5194

Ex Output:
-14752


Ex Input:
5602 + 7126 - 4098 + 3895

Ex Output:

-1321