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:
8932 # 2337 @ 825 # 8463 @ 528

Ex Output:
-515


Ex Input:
2020 @ 8125 # 252 # 2790 # 9183 @ 3123 # 7282 # 5115 # 1943

Ex Output:
-13297


Ex Input:
9924 @ 6266 # 7022 # 7976 # 2541 @ 5396

Ex Output:

4047