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:
5052 # 6923 @ 1011

Ex Output:
-860


Ex Input:
9084 # 8139 @ 4937

Ex Output:
5882


Ex Input:
5755 # 5367 @ 3190 # 4320 # 5398 @ 8389 @ 8899 # 9300

Ex Output:

1848