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:
9924 @ 6266 # 7022 # 7976 # 2541 @ 5396

Ex Output:
4047


Ex Input:
4101 @ 2536 # 502

Ex Output:
6135


Ex Input:
5496 @ 2979 @ 3355 @ 7024 # 2225

Ex Output:

16629