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:
353 # 799 @ 4824 # 3212 @ 1811 @ 752

Ex Output:
3729


Ex Input:
3303 @ 1775 # 9738 @ 1433 @ 5484 @ 2221

Ex Output:
4478


Ex Input:
4839 # 9558 @ 1236 # 8758 # 3209

Ex Output:

-15450