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:
1744 @ 4800 # 4688 @ 2637 # 1656 # 4459 # 9618 @ 4120

Ex Output:
-7120


Ex Input:
3393 # 1959 # 4338 # 8197 @ 3993 # 7625 # 7892

Ex Output:
-22625


Ex Input:
7864 # 853 # 5645 @ 2691 @ 3890

Ex Output:

7947