37 lines
1.1 KiB
Rust
37 lines
1.1 KiB
Rust
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use std::fs::File;
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use std::io::{self, BufRead};
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use std::path::Path;
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fn main() {
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let file_path = String::from("/home/wafoo/advent_of_code_2022/aoc_06a/input2");
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let mut index = 4;
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println!("In file {}", file_path);
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if let Ok(lines) = read_lines(file_path) {
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// Consumes the iterator, returns an (Optional) String
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for line in lines {
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if let Ok(ip) = line {
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let mut slice = &ip[(index - 4)..index];
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while !(slice[0..1] != slice[1..2]
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&& slice[1..2] != slice[2..3]
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&& slice[0..1] != slice[2..3]
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&& slice[0..1] != slice[3..4]
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&& slice[1..2] != slice[3..4]
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&& slice[2..3] != slice[3..4])
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{
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index += 1;
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slice = &ip[(index - 4)..index];
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}
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}
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}
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}
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println!("{}", index);
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}
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fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
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where P: AsRef<Path>, {
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let file = File::open(filename)?;
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Ok(io::BufReader::new(file).lines())
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}
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