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:
4470 @ 7285 # 4583 @ 9451 # 3236 # 3108 # 2875

Ex Output:
7404


Ex Input:
9938 # 267 # 6696 # 8186 # 5729 # 8517 # 6331 @ 7607

Ex Output:
-18181


Ex Input:
6434 # 4229 @ 352 @ 241 # 6825 @ 2444

Ex Output:

-1583