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: 1837 @ 4842 # 1682 @ 5953

Output: 10950


Input: Consider Input: 7534 @ 7329 # 2862 # 947 @ 8590 @ 4064

Output: 23708


Input: Consider Input: 8492 @ 416 # 405 @ 5542


Output: 14045