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:
2678 # 5467 @ 8355 # 3124 # 5654

Ex Output:
-3212


Ex Input:
1767 @ 7166 @ 1543 @ 1185 @ 9966 # 6628

Ex Output:
14999


Ex Input:
9212 # 4912 @ 514 # 8499 @ 8152 # 2864 # 251 @ 9920 # 2326

Ex Output:

8946