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: 643 @ 9262 # 6489 @ 1803 @ 6271

Output: 11490


Input: Consider Input: 9273 # 8850 @ 3050

Output: 3473


Input: Consider Input: 4054 @ 5873 # 3926 # 2524 @ 5551 # 1721


Output: 7307