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:
2497 # 4988 @ 8200 # 3896 @ 5601 @ 1004

Ex Output:
8418


Ex Input:
3367 # 4567 @ 8786 @ 9643 @ 105 # 6364 @ 9695 # 2387 @ 8798

Ex Output:
27076


Ex Input:
5305 @ 9828 # 9827 # 5742 # 1217 # 1363 @ 2648 @ 5509 # 3451

Ex Output:

1690