I have a solution to the puzzle in Rust: https://play.rust-lang.org/?gist=c56bd7d745ffcc90d59e4801e4126ceb&version=stable&mode=debug&edition=2015 https://play.

I have a solution to the puzzle in Rust: https://play.rust-lang.org/?gist=c56bd7d745ffcc90d59e4801e4126ceb&version=stable&mode=debug&edition=2015 https://play.rust-lang.org/?gist=c56bd7d745ffcc90d59e4801e41... new_common_knowledge of A: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18] new_common_knowledge of B: [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18] new_common_knowledge of A: [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] new_common_knowledge of B: [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16] new_common_knowledge of A: [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14] new_common_knowledge of B: [6, 7, 8, 9, 10, 11, 12, 13, 14] new_common_knowledge of A: [6, 7, 8, 9, 10, 11, 12] new_common_knowledge of B: [8, 9, 10, 11, 12] A announces: 20