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:
6853 # 3523 @ 1895 @ 6916 @ 2795 # 8802 # 3074 # 5622 @ 956

Ex Output:
-1606


Ex Input:
2354 @ 5192 @ 5717 # 1833 @ 9672 # 3565

Ex Output:
17537


Ex Input:
2909 @ 1799 # 984 @ 4910 @ 3253 # 6846 # 8324 # 9048

Ex Output:

-12331