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:
958 # 263 # 1097 @ 3868 # 3982

Ex Output:
-516


Ex Input:
3970 # 8486 # 9402 # 8030 @ 4724 @ 8858

Ex Output:
-8366


Ex Input:
4276 # 5354 @ 8246 @ 4421 # 9918 # 8026 # 7345

Ex Output:

-13700