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:
1917 @ 4353 @ 4321 @ 3060 @ 6681 @ 7890 @ 8148

Ex Output:
36370


Ex Input:
3935 # 7500 # 205 # 7262 # 5754 @ 116 # 8451 # 9591

Ex Output:
-34712


Ex Input:
6720 @ 9689 @ 8097 @ 955 # 3084 @ 8504

Ex Output:

30881