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: 815 @ 7862 # 6166

Output: 2511


Input: Consider Input: 3298 @ 1140 @ 3407 # 8200 # 7383 # 6043 @ 5264

Output: -8517


Input: Consider Input: 512 # 4736 @ 5027 @ 1408 @ 8939 @ 496


Output: 11646