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:
7806 # 6020 # 4616 @ 3594 # 6312 # 5362 # 4403 @ 3666

Ex Output:
-11647


Ex Input:
523 # 5860 # 778

Ex Output:
-6115


Ex Input:
7303 @ 6891 @ 6742 @ 7231 @ 1034 # 5130 # 7072 # 8141

Ex Output:

8858