You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
34 lines
817 B
34 lines
817 B
pub fn solve(input: &str) -> String {
|
|
let parsed = input.lines()
|
|
.map(|line| {
|
|
line.split_whitespace().map(str::parse).collect::<Result<Vec<usize>, _>>()
|
|
})
|
|
.collect::<Result<Vec<_>, _>>()
|
|
.expect("couldn't parse input");
|
|
let count = parsed.chunks(3)
|
|
.flat_map(|chunk| {
|
|
vec![
|
|
Triangle(chunk[0][0], chunk[1][0], chunk[2][0]),
|
|
Triangle(chunk[0][1], chunk[1][1], chunk[2][1]),
|
|
Triangle(chunk[0][2], chunk[1][2], chunk[2][2]),
|
|
]
|
|
})
|
|
.filter(Triangle::is_valid)
|
|
.count();
|
|
|
|
count.to_string()
|
|
}
|
|
|
|
struct Triangle(usize, usize, usize);
|
|
impl Triangle {
|
|
fn is_valid(&self) -> bool {
|
|
self.0 + self.1 > self.2 && self.0 + self.2 > self.1 &&
|
|
self.1 + self.2 > self.0
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_triangle() {
|
|
assert!(!Triangle(5, 10, 25).is_valid());
|
|
}
|