28 lines
708 B
Rust
28 lines
708 B
Rust
//! Day 04 of 2021.
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mod bingo;
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mod board;
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use bingo::Bingo;
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use crate::prelude::*;
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/// Get the solution for day 04 of 2021.
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pub fn solution() -> Solution {
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Solution::new(Day::new(4, 2021), part_1, part_2).with_expected(8580, 9576)
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}
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/// The logic to solve part one.
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fn part_1(input: &str) -> Result<String> {
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let (winning_board, latest_number) =
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Bingo::from_str(input)?.play_until_first_win();
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Ok((winning_board.sum_unmarked() * latest_number).to_string())
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}
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/// The logic to solve part two.
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fn part_2(input: &str) -> Result<String> {
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let (winning_board, latest_number) =
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Bingo::from_str(input)?.play_until_last_win();
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Ok((winning_board.sum_unmarked() * latest_number).to_string())
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}
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