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: 2285 @ 1970 @ 4720

Output: 8975


Input: Consider Input: 7127 # 5045 # 1920 # 8991 @ 8656 # 6430 @ 8803 # 7736 @ 887

Output: -4649


Input: Consider Input: 1968 @ 7734 # 8600 # 3679 # 1874


Output: -4451