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

Ex Output:
-13297


Ex Input:
1999 # 5055 @ 6736 # 8829 @ 7010 # 2968 # 259 @ 5904

Ex Output:
4538


Ex Input:
9964 @ 569 @ 1482

Ex Output:

12015