Codle #207

Due to the low number of players, Codle has entered the cycle of utilizing previously used puzzles. This puzzle was first used on 2023-03-19. The text present in the following statement may contain information that is no longer up-to-date, as it has been copied directly from the old puzzle. All Pair Digit Sums https://atcoder.jp/contests/arc158/tasks/arc158_c