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:
6199 # 9863 # 8197 # 3975 @ 1000 @ 740 @ 3216 @ 2122 # 4226

Ex Output:
-12984


Ex Input:
1296 @ 9756 @ 2493 @ 9940 # 5147 # 5428 # 5741 # 828

Ex Output:
6341


Ex Input:
3072 # 4811 # 4994 # 3015

Ex Output:

-9748