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:
1262 # 4309 # 2911

Ex Output:
-5958


Ex Input:
2167 # 8760 # 4771 # 8633 @ 7929 @ 9784 @ 6892

Ex Output:
4608


Ex Input:
7425 # 2090 @ 7112 @ 6739 @ 6089 @ 3205 # 4014 # 4375

Ex Output:

20091