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:
2186 # 2436 # 4269 # 2175 @ 4101 # 2723 @ 6192 # 7530

Ex Output:
-6654


Ex Input:
4787 # 6151 # 6235

Ex Output:
-7599


Ex Input:
8041 # 2837 # 4678

Ex Output:

526