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: 519 @ 9686 @ 3145 # 9320

Output: 4030


Input: Consider Input: 8172 @ 6594 # 2768 # 40 @ 9214 @ 3626

Output: 24798


Input: Consider Input: 6894 # 2834 @ 9131


Output: 13191