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:
9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794

Ex Output:
8174


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

Ex Output:
-14752


Ex Input:
1995 + 5010 - 1344 + 4336 - 7119

Ex Output:

1112