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:
7936 @ 9333 @ 6122 @ 6291 # 210

Ex Output:
29472


Ex Input:
1076 @ 6433 # 796 # 1827 # 5999 @ 96 # 7117

Ex Output:
-8134


Ex Input:
4787 # 6151 # 6235

Ex Output:

-7599