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:
2367 @ 4877 @ 8467 @ 5488 # 987 # 8899

Ex Output:
11313


Ex Input:
2113 # 9012 @ 5533 @ 5034 # 9159 # 2169 # 9889

Ex Output:
-17549


Ex Input:
2201 @ 2253 # 7504 # 3820 @ 7993 @ 68 @ 5355

Ex Output:

6546