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:
3438 # 3865 # 956 # 3020 @ 2696

Ex Output:
-1707


Ex Input:
6055 # 1440 # 3272 # 5643 @ 150 @ 7658 # 8655 @ 8463 # 8156

Ex Output:
-4840


Ex Input:
142 # 8516 @ 3411 # 7932 # 4096 # 9446 # 9453 @ 3707

Ex Output:

-32183