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:
1949 @ 526 @ 1777 @ 8065 @ 2790 # 1800 # 486 @ 229 @ 7738

Ex Output:
20788


Ex Input:
6915 @ 3564 # 9197 # 9440 # 1112 @ 382 @ 9681 # 6512 # 9658

Ex Output:
-15377


Ex Input:
1578 # 2405 @ 6394 # 6953 # 5511 # 5043 # 8624 @ 382

Ex Output:

-20182