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:
9012 @ 4688 # 2482 # 8827 # 2749 # 259 # 8385

Ex Output:
-9002


Ex Input:
1199 # 1369 @ 4358 # 7803 @ 410 @ 1295 @ 4397 # 9436 @ 5291

Ex Output:
-1658


Ex Input:
7097 @ 7331 # 1062 @ 5463 # 9574 @ 8907 # 4635

Ex Output:

13527