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:
6597 @ 1596 # 358 # 9057 @ 993

Ex Output:
-229


Ex Input:
6744 # 8579 # 1271 @ 9372 @ 5898

Ex Output:
12164


Ex Input:
4330 # 5920 @ 5433 @ 2630 @ 4489 @ 9320

Ex Output:

20282