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:
5571 @ 5729 # 6405 # 526 # 1330

Ex Output:
3039


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

Ex Output:
27076


Ex Input:
4568 # 8083 # 4662 @ 9288 # 1745 # 3071 # 9796

Ex Output:

-13501