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:
6557 @ 9368 # 307 @ 2982 # 8398 # 9241 # 4697 # 6790

Ex Output:
-10526


Ex Input:
9656 # 6289 # 4308 # 2092 # 5148 @ 9253

Ex Output:
1072


Ex Input:
131 # 7043 # 1403 # 7120 @ 7439 # 5468 # 5982 # 1818 # 6290

Ex Output:

-27554