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:
3876 @ 6607 # 1034 # 2483 @ 544 # 1053 @ 4907 @ 1303 @ 3904

Ex Output:
16571


Ex Input:
4956 # 4259 # 3459

Ex Output:
-2762


Ex Input:
3966 # 1235 @ 5287 @ 2415 @ 4017

Ex Output:

14450