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: 2367 @ 4877 @ 8467 @ 5488 # 987 # 8899

Output: 11313


Input: Consider Input: 4558 @ 6469 @ 1154

Output: 12181


Input: Consider Input: 9231 # 5672 @ 477 # 691 # 4446 # 2500 # 2663 @ 3248


Output: -3016