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

Input: Consider Input: 1999 # 5055 @ 6736 # 8829 @ 7010 # 2968 # 259 @ 5904

Output: 4538


Input: Consider Input: 6733 # 361 @ 8396 @ 7920 @ 7915 # 1370 @ 5576 # 1321 @ 343

Output: 33831


Input: Consider Input: 7171 # 8534 @ 8130 # 1198 # 5473


Output: 96