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:
7371 # 9025 @ 8352 # 9201 # 9297 # 3561 @ 8576

Ex Output:
-6785


Ex Input:
5110 # 9803 @ 2485 # 1678

Ex Output:
-3886


Ex Input:
2465 @ 3523 @ 9862 @ 424 @ 7773 # 7467

Ex Output:

16580