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:
7272 @ 8958 # 7231 @ 6616

Ex Output:
15615


Ex Input:
4586 # 8527 @ 5828 @ 460 @ 1195

Ex Output:
3542


Ex Input:
4047 # 7628 # 9185 # 8947 # 7911 @ 8209 # 6383 # 7968 @ 6175

Ex Output:

-29591