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: 6420 @ 6956 @ 9478 # 4046

Output: 18808


Input: Consider Input: 3529 @ 2441 @ 1274 # 3916 @ 9691 @ 1272 # 1286

Output: 13005


Input: Consider Input: 321 # 7270 @ 7261


Output: 312