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:
2653 @ 9718 # 3237 @ 2973 # 6895 # 18

Ex Output:
5194


Ex Input:
2095 # 5428 @ 3055 @ 1752 @ 2919 # 3592 # 7407

Ex Output:
-6606


Ex Input:
1426 @ 331 # 2795 # 6683 @ 573 @ 8207

Ex Output:

1059