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:
3938 @ 6900 @ 1254 @ 25 # 7237 # 5576 @ 8865 # 8864 @ 1349

Ex Output:
654


Ex Input:
381 # 4084 # 9377 # 3092

Ex Output:
-16172


Ex Input:
9930 # 4301 # 1326 # 1995

Ex Output:

2308