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:
6385 # 7829 @ 2463 @ 3411 # 652 # 5880 # 6454

Ex Output:
-8556


Ex Input:
6420 @ 6956 @ 9478 # 4046

Ex Output:
18808


Ex Input:
9481 @ 5072 @ 4134 @ 4269 @ 2820 @ 2430 @ 2755 @ 2371 # 9665

Ex Output:

23667