AT_past18_b レーティング

On AtCoder, the competitive programming website, each user is graded by a value called rating. Every time a user participates in a programming contest, their performance is quantified and affects their rating. If a user's rating before a contest is $ R $ and their performance in the contest is $ P $ , their rating after the contest $ R' $ is approximated by: > $ R' = \lfloor 0.9 \times R + 0.1 \times P \rfloor $ , where $ \lfloor x \rfloor $ represents the maximum integer not exceeding $ x $ . Given $ R $ and $ P $ as input, evaluate and print $ R' $ according to the approximation formula above.

The input is given from Standard Input in the following format: > $ R $ $ P $

Print the answer as an integer.

### Sample Explanation 1 We have $ R' = \lfloor 0.9 \times 2516 + 0.1 \times 2320 \rfloor = \lfloor 2496.4 \rfloor = 2496 $ . ### Constraints - $ 1 \leq R, P \leq 4400 $ - $ R $ and $ P $ are integers.