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:
9056 @ 9894 # 9773 # 4508 # 5642

Ex Output:
-973


Ex Input:
7371 # 9025 @ 8352 # 9201 # 9297 # 3561 @ 8576

Ex Output:
-6785


Ex Input:
2377 @ 4500 # 8359 @ 9946 # 9011

Ex Output:

-547