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: 9817 @ 5042 # 1724 @ 799 @ 685

Output: 14619


Input: Consider Input: 3393 # 1959 # 4338 # 8197 @ 3993 # 7625 # 7892

Output: -22625


Input: Consider Input: 4036 # 1423 # 8908


Output: -6295