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: 2339 @ 2821 # 2234 @ 1271 @ 471

Output: 4668


Input: Consider Input: 2095 # 5428 @ 3055 @ 1752 @ 2919 # 3592 # 7407

Output: -6606


Input: Consider Input: 2605 # 3453 @ 5543 @ 2400 @ 8799 @ 3298 @ 4981 @ 9739 # 178


Output: 33734