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:
519 @ 5751 @ 8900 @ 3476 # 8727 # 9607 # 350 @ 8481

Ex Output:
8443


Ex Input:
3347 # 2950 @ 6671 @ 4670 # 7283

Ex Output:
4455


Ex Input:
9601 @ 8961 @ 6431 # 6457 @ 4597 @ 2564 # 5310 # 1451 @ 7395

Ex Output:

26331