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: 6896 @ 8548 @ 1670 @ 7550 # 921

Output: 23743


Input: Consider Input: 540 @ 8823 @ 1244 # 1696 # 889 # 6035 # 5113 @ 2513

Output: -613


Input: Consider Input: 8041 @ 762 @ 8091 @ 6500


Output: 23394