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:
2996 @ 6178 @ 7214 # 172 # 3711

Ex Output:
12505


Ex Input:
4532 @ 5773 @ 2346 @ 6961 # 8280

Ex Output:
11332


Ex Input:
331 # 9967 @ 21 @ 480 # 3926 @ 8770 @ 5909 @ 6288 # 1226

Ex Output:

6680