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: 2808 @ 9510 # 4684 @ 8160 # 7003 # 6631 # 9199 # 455

Output: -7494


Input: Consider Input: 4449 @ 4019 @ 7637

Output: 16105


Input: Consider Input: 6263 @ 7662 @ 1890 @ 4302 @ 3150 @ 8081 @ 4168 # 7082 @ 1077


Output: 29511