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:
3126 - 612 - 9485 - 3358 + 8070

Ex Output:
8511


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

Ex Output:
24143


Ex Input:
9343 + 4250 - 8938 - 2380

Ex Output:

16411