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use serde::{Deserialize, Serialize}; /// Triangle. #[derive(Debug, Default, Copy, Clone, PartialEq, Serialize, Deserialize)] pub struct Triangle { /// First point. pub a: usize, /// Second point. pub b: usize, /// Third point. pub c: usize, } impl From<[usize; 3]> for Triangle { fn from([a, b, c]: [usize; 3]) -> Self { Self { a, b, c } } }