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: 9407 @ 4324 # 2220 # 8668 @ 1606 @ 4059

Output: 8508


Input: Consider Input: 2243 # 9188 # 3609 # 6813 @ 6109 @ 6045

Output: -5213


Input: Consider Input: 7534 @ 7329 # 2862 # 947 @ 8590 @ 4064


Output: 23708


