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:
6775 @ 249 @ 1171 @ 3376 # 7127

Ex Output:
4444


Ex Input:
6597 @ 1596 # 358 # 9057 @ 993

Ex Output:
-229


Ex Input:
344 # 7553 @ 7224 @ 1616 @ 672 @ 916

Ex Output:

3219