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:
2026 @ 9494 # 8161

Ex Output:
3359


Ex Input:
8157 # 6333 @ 7928

Ex Output:
9752


Ex Input:
427 # 7974 # 7564 @ 2404 # 4955 # 1239 # 1518 @ 906

Ex Output:

-19513