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:
9049 # 6438 @ 8686 # 910 # 3586

Ex Output:
6801


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

Ex Output:
3623


Ex Input:
2257 # 7428 @ 3534 # 4706 @ 6649 @ 2059

Ex Output:

2365