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: 5460 # 8572 @ 5548

Output: 2436


Input: Consider Input: 6475 @ 5108 @ 6769 @ 2718 @ 609 @ 9675


Output: 31354