32 lines
911 B
Rust
32 lines
911 B
Rust
use color_eyre::eyre;
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use crate::lib::ParseLines;
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fn run(data: &str) -> eyre::Result<()> {
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let mut single_increases = 0;
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let mut window_increases = 0;
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let mut prev = (None, None, None);
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for res in data.parse_lines::<i32>() {
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let n = res?;
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if let Some(p) = prev.2 {
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// apparently we can't combine "if let" and regular boolean conditions
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if n > p {
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single_increases += 1;
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}
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}
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if let (Some(first), Some(second), Some(third)) = prev {
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if (n + second + third) > (first + second + third) {
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window_increases += 1;
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}
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}
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// would have forgotten this if not for the warning triggered by "let mut" without mutation
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prev = (prev.1, prev.2, Some(n));
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}
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println!("One: {}", single_increases);
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println!("Two: {}", window_increases);
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Ok(())
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}
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