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:
2404 @ 4359 # 5006 # 2796 # 6139

Ex Output:
-7178


Ex Input:
7773 @ 3264 # 8041 @ 4068 # 5476 # 5946 # 8987 # 7719

Ex Output:
-21064


Ex Input:
4211 @ 5336 @ 5917 @ 3327 @ 9938 # 2357

Ex Output:

26372