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: 345 @ 1076 @ 7948 # 854

Output: 8515


Input: Consider Input: 9285 # 5492 @ 6629 # 5477 @ 5969 # 8754

Output: 2160


Input: Consider Input: 467 @ 554 # 4015 @ 5512 # 3792


Output: -1274


