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:
8678 @ 7424 # 7399 @ 4601 @ 9327 @ 7787 @ 2286

Ex Output:
32704


Ex Input:
720 # 1309 @ 989 @ 1211 # 5749 # 7 @ 3147 # 9792 # 1243

Ex Output:
-12033


Ex Input:
7424 @ 7252 # 579 # 2648 @ 6396 # 9732 @ 3538

Ex Output:

11651