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:
5462 - 3916 + 9462 - 8867 - 7357

Ex Output:
16140


Ex Input:
2969 - 5770 - 665 + 516 - 1172 + 4904 - 384

Ex Output:
5540


Ex Input:
7746 - 2667 + 1801 - 5756 - 6076 - 6701 + 3002

Ex Output:

24143