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: 4809 # 9135 # 3011 # 4393 # 1039 # 3878 @ 1559 # 3798

Output: -18886


Input: Consider Input: 9407 @ 4324 # 2220 # 8668 @ 1606 @ 4059

Output: 8508


Input: Consider Input: 6816 # 9668 @ 5476


Output: 2624