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: 720 # 1309 @ 989 @ 1211 # 5749 # 7 @ 3147 # 9792 # 1243

Output: -12033


Input: Consider Input: 6498 @ 5274 @ 7767 @ 489 @ 9464 @ 8010 # 3212 @ 7819 # 1173


Output: 40936