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:
9924 @ 6266 # 7022 # 7976 # 2541 @ 5396

Ex Output:
4047


Ex Input:
2354 @ 5192 @ 5717 # 1833 @ 9672 # 3565

Ex Output:
17537


Ex Input:
2 @ 4824 @ 9912 @ 1937 @ 1334 @ 639 # 296 # 1283 # 218

Ex Output:

16851