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

Output: -12033


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

Output: 14999


Input: Consider Input: 925 # 2147 # 8217 @ 5049 @ 5491


Output: 1101