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:
8842 @ 3530 @ 7537

Ex Output:
19909


Ex Input:
2932 # 4372 # 9818 # 101 # 5357 # 8354 @ 7479

Ex Output:
-17591


Ex Input:
762 # 9966 @ 8055 @ 8763 # 911 # 2603 @ 3075

Ex Output:

7175