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:
5640 @ 148 @ 7578 # 2373 # 3438 @ 4775 # 8187

Ex Output:
4143


Ex Input:
9255 @ 7467 @ 4436 @ 126 # 3569 # 8239

Ex Output:
9476


Ex Input:
1730 # 9936 @ 1152 @ 4916 @ 7588 # 505 @ 4525 # 4577

Ex Output:

4893