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: 8932 # 2337 @ 825 # 8463 @ 528

Output: -515


Input: Consider Input: 693 # 2562 @ 733 # 3913 @ 310

Output: -4739


Input: Consider Input: 7906 # 507 @ 8039


Output: 15438