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:
2339 @ 2821 # 2234 @ 1271 @ 471

Ex Output:
4668


Ex Input:
5249 @ 1204 # 3908 # 5196 @ 1711 @ 8089 # 8419 # 2865 @ 1478

Ex Output:
-2657


Ex Input:
3002 # 7124 # 4854 # 4318 # 6460 @ 337 @ 8796 @ 3336 @ 8784

Ex Output:

1499