[2016][rust][7.1]

profile
Alpha Chen 8 years ago
parent 053b51107d
commit 7970c23d88

@ -3,7 +3,7 @@ use errors::*;
pub fn solve(input: &str) -> Result<String> { pub fn solve(input: &str) -> Result<String> {
Ok(input.lines() Ok(input.lines()
.map(|x| IP7::new(x)) .map(|x| IP7::new(x))
.filter(IP7::supports_tls) .filter(IP7::supports_ssl)
.count() .count()
.to_string()) .to_string())
} }
@ -40,15 +40,36 @@ impl IP7 {
} }
} }
fn supports_tls(&self) -> bool { pub fn supports_tls(&self) -> bool {
self.supernets.iter().any(|x| Self::abba(x)) && self.supernets.iter().any(|x| Self::abba(x)) &&
self.hypernets.iter().all(|x| !Self::abba(x)) self.hypernets.iter().all(|x| !Self::abba(x))
} }
fn supports_ssl(&self) -> bool {
let abas: Vec<String> =
self.supernets.iter().flat_map(|x| {
Self::abas(x).iter().map(|aba| {
let mut c = aba.chars();
let a = c.next().unwrap();
let b = c.next().unwrap();
format!("{}{}{}", b, a, b)
}).collect::<Vec<_>>()
}).collect();
self.hypernets.iter().any(|x| abas.iter().any(|y| x.contains(y)))
}
fn abba(s: &str) -> bool { fn abba(s: &str) -> bool {
let v: Vec<_> = s.chars().collect(); let v: Vec<_> = s.chars().collect();
v.windows(4).any(|w| (w[0] != w[1]) && (w[0] == w[3]) && (w[1] == w[2])) v.windows(4).any(|w| (w[0] != w[1]) && (w[0] == w[3]) && (w[1] == w[2]))
} }
fn abas(s: &str) -> Vec<String> {
let v: Vec<_> = s.chars().collect();
v.windows(3)
.filter(|w| (w[0] != w[1]) && (w[0] == w[2]))
.map(|w| w.iter().map(|&x| x).collect())
.collect()
}
} }
#[cfg(test)] #[cfg(test)]
@ -75,4 +96,18 @@ mod tests {
assert_eq!(IP7::new("aaaa[qwer]tyui").supports_tls(), false); assert_eq!(IP7::new("aaaa[qwer]tyui").supports_tls(), false);
assert_eq!(IP7::new("ioxxoj[asdfgh]zxcvbn").supports_tls(), true); assert_eq!(IP7::new("ioxxoj[asdfgh]zxcvbn").supports_tls(), true);
} }
#[test]
fn test_abas() {
assert_eq!(IP7::abas("zazbz"),
vec!["zaz".to_string(), "zbz".to_string()]);
}
#[test]
fn test_supports_ssl() {
assert!(IP7::new("aba[bab]xyz").supports_ssl());
assert!(!IP7::new("xyx[xyx]xyx").supports_ssl());
assert!(IP7::new("aaa[kek]eke").supports_ssl());
assert!(IP7::new("zazbz[bzb]cdb").supports_ssl());
}
} }

Loading…
Cancel
Save