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:
6979 # 7807 @ 3778 # 1362 @ 8374 # 3189 @ 5988

Ex Output:
12761


Ex Input:
9786 @ 7240 # 8099 @ 100 @ 4573 @ 5982 @ 9270 @ 9911 # 8249

Ex Output:
30514


Ex Input:
3938 # 5535 # 7157

Ex Output:

-8754