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

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

Ex Output:
-7494

Ex Input:
3276 # 8656 # 2580 @ 7528 @ 344 @ 6066 # 9323 # 6974 # 6635

Ex Output:
-16954

Ex Input:
2808 # 5361 @ 6839 # 4919

Ex Output:
-633