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:
8129 # 5764 @ 7961 # 2052 @ 6379

Ex Output:
14653


Ex Input:
4400 @ 9261 @ 3016

Ex Output:
16677


Ex Input:
9131 @ 9939 @ 2233

Ex Output:

21303