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:
8760 @ 4583 # 2942 # 3854 # 5061 @ 31 # 5965

Ex Output:
-4448


Ex Input:
6960 # 4418 @ 5450 @ 8475

Ex Output:
16467


Ex Input:
1439 @ 4809 @ 6755 # 4840 @ 491 @ 9049 @ 8905 @ 8915

Ex Output:

35523