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:
5837 # 1015 # 4725

Ex Output:
97


Ex Input:
6942 @ 1857 @ 1508 @ 3059 # 6727

Ex Output:
6639


Ex Input:
445 # 5783 # 3236 # 9634 # 2299 # 2757 @ 3895 @ 5353 # 5757

Ex Output:

-19773