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: 4101 @ 2536 # 502

Output: 6135


Input: Consider Input: 5110 # 9803 @ 2485 # 1678

Output: -3886


Input: Consider Input: 8193 # 7515 @ 5618 # 1425 @ 5846


Output: 10717