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:
120 # 2644 @ 4589

Ex Output:
2065


Ex Input:
64 # 5994 @ 8659 # 885

Ex Output:
1844


Ex Input:
4353 @ 7892 # 2427 @ 8505 @ 9818 @ 3913

Ex Output:

32054


