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: 7803 @ 6524 @ 7077 # 1627 # 3959

Output: 15818


Input: Consider Input: 7021 # 2043 @ 7414 # 2632 @ 2939 @ 8718 @ 2731

Output: 24148


Input: Consider Input: 4261 @ 2008 # 250


Output: 6019