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:
2932 # 4372 # 9818 # 101 # 5357 # 8354 @ 7479

Ex Output:
-17591


Ex Input:
440 @ 5472 # 6900 # 3389

Ex Output:
-4377


Ex Input:
4615 # 4401 # 7509 # 9011 # 578 # 503 # 9818 # 1051 # 915

Ex Output:

-29171