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:
4867 # 7162 @ 1616 # 596 # 7845 @ 9594 # 3650 @ 6833

Ex Output:
3657


Ex Input:
5211 # 3266 @ 3042 @ 254 # 7823 @ 4298 # 8042 # 1629 # 6738

Ex Output:
-14693


Ex Input:
3455 # 5920 # 175 # 6540 # 7926

Ex Output:

-17106