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:
2724 @ 8119 @ 1049 @ 9004

Ex Output:
20896


Ex Input:
7178 # 2086 # 1606 @ 4624 @ 4559 # 4855

Ex Output:
7814


Ex Input:
4977 # 6056 @ 6700 @ 6783 # 7142 @ 3900

Ex Output:

9162