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:
2724 @ 8119 @ 1049 @ 9004

Ex Output:
20896


Ex Input:
2065 @ 2103 @ 1800

Ex Output:
5968


Ex Input:
6342 # 222 @ 9002 # 9419 @ 8677 @ 4971 # 4722 @ 2299

Ex Output:

16928