37 lines
1.2 KiB
Rust
37 lines
1.2 KiB
Rust
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use {color_eyre::eyre::ContextCompat, color_eyre::Result, std::io::stdin};
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fn main() -> Result<()> {
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Ok(println!(
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"{}",
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stdin()
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.lines()
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.map(|ln| -> Result<_> {
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let ln = ln?;
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let (winning, nums) = ln
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.split_once(':')
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.context("Invalid record: missing ':' separator")?
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.1
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.split_once('|')
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.context("Invalid record: missing '|' separator")?;
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let winning = winning
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.split_whitespace()
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.map(str::parse)
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.collect::<Result<Box<[u64]>, _>>()?;
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let n = nums
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.split_whitespace()
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.map(str::parse)
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.map(|item| item.map(|item| winning.contains(&item)))
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.try_fold::<_, _, Result<_>>(0, |acc, x| Ok(acc + x? as u64))?;
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if n != 0 {
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Ok(2_u64.pow(u32::try_from(n)?.saturating_sub(1)))
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} else {
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Ok(0)
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}
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})
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.try_fold::<_, _, Result<_>>(0, |acc, x| Ok(acc + x?))?
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))
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}
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