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

Ex Output:
-2657


Ex Input:
5253 @ 2450 @ 1316 @ 9889 @ 6449 @ 4948

Ex Output:
30305


Ex Input:
5237 # 7064 @ 7830 # 8206

Ex Output:

-2203