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:
7894 @ 7649 # 4792

Ex Output:
10751


Ex Input:
7930 # 2835 # 1925 # 6613

Ex Output:

-3443