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: 9924 @ 6266 # 7022 # 7976 # 2541 @ 5396

Output: 4047


Input: Consider Input: 9582 @ 3554 @ 1044 @ 880 # 6787 # 6161

Output: 2112


Input: Consider Input: 6881 @ 1331 # 470 @ 6067 # 9323


Output: 4486