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: 4331 # 7606 @ 9043 @ 9912 @ 1560 # 5858 @ 703

Output: 12085


Input: Consider Input: 7196 # 1687 @ 6487 # 2628 # 1938 # 3056


Output: 4374