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: 1737 # 3662 # 9496 @ 694

Output: -10727


Input: Consider Input: 4324 # 426 # 9171 # 980 @ 9454 @ 9720 # 7367 # 9266 # 1237

Output: -4949


Input: Consider Input: 6682 @ 3444 @ 539 @ 8208 @ 3857


Output: 22730