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:
4844 # 1525 @ 1894 # 2506

Ex Output:
2707


Ex Input:
9024 # 5882 # 8531 # 9692 # 8354 @ 9065 # 1468

Ex Output:
-15838


Ex Input:
5720 # 2000 # 8296 # 306 # 3102 @ 8758 @ 8356 @ 2937 # 7306

Ex Output:

4761