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pub fn part(input: &str, m: usize) -> usize {
let n = input.len();
for i in 0..n {
let s = &input[i..i + m];
let mut check = false;
if s.trim().len() < m {
break;
}
'o: for j in 0..m {
for k in 0..m {
if j == k {
continue;
}
if s.chars().nth(j) == s.chars().nth(k) {
check = true;
break 'o;
}
}
}
if !check {
return i + m;
}
}
0
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_example() {
let input = include_str!("../example.txt");
let result = part(input, 4);
assert_eq!(result, 5);
}
#[test]
fn test_input() {
let input = include_str!("../input.txt");
let result = part(input, 4);
assert_eq!(result, 1779);
}
#[test]
fn test_example2() {
let input = include_str!("../example.txt");
let result = part(input, 14);
assert_eq!(result, 23);
}
#[test]
fn test_input2() {
let input = include_str!("../input.txt");
let result = part(input, 14);
assert_eq!(result, 23);
}
}
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