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:
1919 @ 7586 # 3931 @ 8451 # 8366

Ex Output:
5659


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

Ex Output:
4047


Ex Input:
2857 @ 4036 @ 5166 @ 5888 @ 6960 @ 965 # 5198 @ 3990 # 4603

Ex Output:

20061