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:
9276 @ 7324 @ 3048 # 8186 # 4920 # 2964

Ex Output:
3578


Ex Input:
4970 @ 8711 @ 6188

Ex Output:
19869


Ex Input:
8488 # 2275 @ 2123 @ 1142 # 6196 @ 6613 # 7095

Ex Output:

2800