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: 9807 @ 9345 # 5133 # 8042 @ 1499 # 8153 # 638

Output: -1315


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

Output: 14999


Input: Consider Input: 7908 # 5904 # 9611 @ 5225 # 8397 @ 3435 @ 6374


Output: -970