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:
1185 # 6431 @ 1326 # 2840 # 9276

Ex Output:
-16036


Ex Input:
1086 # 7477 # 9664 @ 5904 # 8033 # 5563

Ex Output:
-23747


Ex Input:
8166 @ 6366 # 7413 # 6499 # 15

Ex Output:

605