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:
1062 @ 9466 @ 4653

Ex Output:
15181


Ex Input:
9334 @ 7802 # 105

Ex Output:

17031