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:
1221 @ 4619 # 3319 @ 2958

Ex Output:
5479


Ex Input:
1614 @ 5794 # 2578

Ex Output:
4830


Ex Input:
1384 # 6697 # 8929 @ 8958 @ 1274

Ex Output:

-4010