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: 7640 @ 3347 @ 904

Output: 11891

Input: Consider Input: 7757 # 4475 @ 6447 # 2209 # 9966

Output: -2446

Input: Consider Input: 9578 @ 5703 @ 686 # 400 # 5356
Output: 10211