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: 2821 @ 5327 # 3350 # 3607 @ 7010 @ 6824 # 9975 # 38

Output: 5012


Input: Consider Input: 2020 @ 862 # 5780

Output: -2898


Input: Consider Input: 4174 @ 8689 @ 4736


Output: 17599