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:
2853 @ 2447 @ 3565

Ex Output:
8865


Ex Input:
4612 @ 9447 # 3444 @ 1269

Ex Output:
11884


Ex Input:
5127 @ 1503 @ 9610 @ 3348

Ex Output:

19588


