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: 549 @ 2405 # 8368 @ 806 @ 5639

Output: 1031


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

Output: -7494


Input: Consider Input: 1185 # 6431 @ 1326 # 2840 # 9276


Output: -16036