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:
486 # 3873 # 1187

Ex Output:
-4574


Ex Input:
2790 @ 783 # 3296 # 6461 @ 9538 # 6285 @ 4067 @ 9734

Ex Output:

10870