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:
4101 @ 2536 # 502

Ex Output:
6135


Ex Input:
192 # 4739 @ 5302 @ 6325 @ 5528 @ 1101 # 157 # 6921 @ 5541

Ex Output:
12172


Ex Input:
2080 # 7935 # 5429

Ex Output:

-11284