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:
4809 # 9135 # 3011 # 4393 # 1039 # 3878 @ 1559 # 3798

Ex Output:
-18886


Ex Input:
7671 # 7716 @ 5899 @ 2520 # 497 # 24 # 16 # 840 # 9556

Ex Output:
-2559


Ex Input:
8576 # 5834 # 9145 # 4269 # 979 # 4257 @ 5788

Ex Output:

-10120