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25 lines
574 B
25 lines
574 B
8 years ago
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pub fn solve(input: &str) -> String {
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let parsed = input.split_whitespace()
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.map(str::parse)
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.collect::<Result<Vec<usize>, _>>()
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.expect("unable to parse input");
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let count = parsed.chunks(3)
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.map(|w| Triangle(w[0], w[1], w[2]))
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.filter(Triangle::is_valid)
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.count();
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count.to_string()
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}
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struct Triangle(usize, usize, usize);
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impl Triangle {
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fn is_valid(&self) -> bool {
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self.0 + self.1 > self.2 && self.0 + self.2 > self.1 &&
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self.1 + self.2 > self.0
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}
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}
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#[test]
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fn test_triangle() {
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assert!(!Triangle(5, 10, 25).is_valid());
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}
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