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:
693 # 2562 @ 733 # 3913 @ 310

Ex Output:
-4739


Ex Input:
560 # 6677 # 4809 @ 4714 # 5579 # 1300

Ex Output:

-13091