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:
6729 # 6577 # 4789 # 6061 # 1189 # 2628 # 6930 @ 3226

Ex Output:
-18219


Ex Input:
6050 # 5266 # 3005

Ex Output:
-2221


Ex Input:
554 # 5634 # 8799 # 5878

Ex Output:

-19757