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:
2065 @ 2103 @ 1800

Ex Output:
5968


Ex Input:
4867 # 7162 @ 1616 # 596 # 7845 @ 9594 # 3650 @ 6833

Ex Output:
3657


Ex Input:
8712 # 5912 @ 2490 # 5062 @ 4960 @ 2866

Ex Output:

8054