39 lines
1.1 KiB
Rust
39 lines
1.1 KiB
Rust
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("input");
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let mut result_vec = Vec::<u32>::new();
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result_vec.push(0);
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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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match ip.as_str() {
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"" => result_vec.push(0),
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_ => {
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let index = result_vec.len() - 1;
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result_vec[index] += ip.parse::<u32>().unwrap();
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}
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}
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}
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}
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}
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let index = result_vec.len() - 1;
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result_vec.sort();
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let result = result_vec[index] + result_vec[index - 1] + result_vec[index - 2];
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println!("{}", result);
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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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