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: 6729 # 1204 # 5514 # 8079

Output: -8068


Input: Consider Input: 839 # 2773 @ 2850 @ 4857 @ 5774 @ 8069 @ 6921


Output: 26537