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:
2787 @ 3800 # 142 # 7750 # 8581 @ 5447 @ 1512 @ 6550

Ex Output:
3623


Ex Input:
7539 # 9710 # 800 # 5609

Ex Output:
-8580


Ex Input:
7616 # 937 @ 5615 @ 7626 # 2497 @ 7474

Ex Output:

24897