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:
6775 @ 249 @ 1171 @ 3376 # 7127

Ex Output:
4444


Ex Input:
3923 # 9826 # 9066 # 9343 # 4675 @ 4896 # 8019 @ 4615 # 3491

Ex Output:
-30986


Ex Input:
6801 @ 2617 # 6200 # 1559

Ex Output:

1659