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:
9781 # 2797 # 2134

Ex Output:
4850


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

Ex Output:
-2657


Ex Input:
4436 # 5268 # 1268 @ 6329 @ 2281 @ 6729 @ 8011

Ex Output:

21250