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:
5507 @ 4243 @ 5897 @ 7115 # 6687 @ 3875 # 298 @ 1379 @ 1973

Ex Output:
23004


Ex Input:
519 @ 9686 @ 3145 # 9320

Ex Output:
4030


Ex Input:
6264 @ 5568 @ 9703 @ 1741 # 8276 @ 4309

Ex Output:

19309