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:
1855 # 9818 @ 3927 @ 9533 # 8557 @ 619 # 7543 # 2844

Ex Output:
-12828


Ex Input:
2495 @ 7683 @ 706 @ 5746 @ 7998 @ 5941

Ex Output:
30569


Ex Input:
3438 # 3865 # 956 # 3020 @ 2696

Ex Output:

-1707