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

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

Output: 36370


Input: Consider Input: 4368 # 7312 @ 7468 # 4833 # 1476 # 42

Output: -1827


Input: Consider Input: 1777 # 2859 @ 991 # 554 # 5553 # 5084 @ 6645 @ 5443


Output: 806