In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer

Ex Input:
6267 @ 3304 @ 9078 @ 9734 # 2947 # 4223 @ 4824 # 3116

Ex Output:
22921


Ex Input:
7775 @ 8190 # 2579 @ 1003

Ex Output:
14389


Ex Input:
1161 @ 6355 @ 56 @ 8822 @ 3463 # 4485 # 7640 # 3662 # 5513

Ex Output:

-1443