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:
8172 @ 6594 # 2768 # 40 @ 9214 @ 3626

Ex Output:
24798


Ex Input:
2497 # 4988 @ 8200 # 3896 @ 5601 @ 1004

Ex Output:
8418


Ex Input:
8211 # 8147 @ 6341 # 289 @ 8287 # 4593 @ 2540

Ex Output:

12350