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pub fn part1(input: &str) -> u32 {
let mut res: u32 = 0;
let m: Vec<Vec<String>> = input
.trim_end()
.split("\n\n")
.map(|x| {
x.split('\n')
.map(|y| y.chars().collect::<String>())
.collect()
})
.collect();
for s in m {
let n = s.len();
// Search by column
// 012345678
// ><
// #.##..##.
// ..#.##.#.
// ##......#
// ##......#
// ..#.##.#.
// ..##..##.
// #.#.##.#.
// ><
// 012345678
//
let m = s[0].len();
let mut mc = 0;
for i in 0..m {
let mut j = m - 1;
while j > i {
let mut s1 = String::new();
let mut s2 = String::new();
for k in 0..n {
s1.push(s[k].chars().nth(i).unwrap());
s2.push(s[k].chars().nth(j).unwrap());
}
if s1 == s2 {
mc = std::cmp::max(mc, i);
}
j -= 1;
}
}
let mut check = true;
let mut i = mc;
let mut j = mc + 1;
while i > 0 && j < n {
let mut s1 = String::new();
let mut s2 = String::new();
for k in 0..n {
s1.push(s[k].chars().nth(i).unwrap());
if j >= s[k].len() {
break;
}
s2.push(s[k].chars().nth(j).unwrap());
}
if s1 != s2 {
check = false;
break;
}
i -= 1;
j += 1;
}
if check {
res += (mc + 1) as u32;
continue;
}
// Search by row
let mut mc = 0;
for i in 0..(n / 2) + 1 {
for j in ((n / 2)..n).rev() {
if s[i] == s[j] {
mc = std::cmp::max(mc, i);
}
}
}
let mut check = true;
let mut i = mc;
let mut j = mc + 1;
while i > 0 && j < n {
if s[i] != s[j] {
check = false;
break;
}
i -= 1;
j += 1;
}
if check {
res += (mc + 1) as u32 * 100;
continue;
}
}
res
}
// pub fn part2(input: &str) -> u32 {
// let mut res: u32 = 0;
//
// res
// }
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn example_part1() {
let input = include_str!("../example.txt");
let result = part1(input);
assert_eq!(result, 405);
}
#[test]
fn input_part1() {
let input = include_str!("../input.txt");
let result = part1(input);
assert_eq!(result, 2331);
}
//
// #[test]
// fn example_part2() {
// let input = include_str!("../example.txt");
// let result = part2(input);
// assert_eq!(result, 2286);
// }
//
// #[test]
// fn input_part2() {
// let input = include_str!("../input.txt");
// let result = part2(input);
// assert_eq!(result, 71585);
// }
}
|
