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:
6557 @ 9368 # 307 @ 2982 # 8398 # 9241 # 4697 # 6790

Ex Output:
-10526


Ex Input:
7127 # 5045 # 1920 # 8991 @ 8656 # 6430 @ 8803 # 7736 @ 887

Ex Output:
-4649


Ex Input:
8157 # 2717 # 1214 @ 8558 @ 7391 # 7163 @ 6203 # 6912

Ex Output:

12303