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:
5031 # 649 # 8975 @ 1853 # 5257 # 1383

Ex Output:
-9380


Ex Input:
1724 @ 9133 @ 2526 # 6781 @ 5120

Ex Output:

11722