39 lines
842 B
Rust
39 lines
842 B
Rust
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use std::fs::File;
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use std::io::{prelude::*, BufReader, Error};
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pub fn aoc_01_01(filename: &str) -> Result<(), Error> {
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let file = File::open(filename).expect("No file");
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let br = BufReader::new(file);
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let mut v: Vec<i64> = vec![];
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for line in br.lines() {
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v.push(line?
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.trim()
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.parse().unwrap());
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}
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for i in 0..v.len()-2 {
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for j in i+1..v.len()-1 {
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if v[i] + v[j] == 2020 {
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println!("aoc_01_01 result: {}", v[i]*v[j]);
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}
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}
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}
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for i in 0..v.len()-3 {
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for j in i+1..v.len()-2 {
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for k in j+1..v.len()-1 {
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if v[i] + v[j] + v[k] == 2020 {
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println!("aoc_01_02 result: {}", v[i] * v[j] * v[k]);
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}
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}
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}
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}
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return Ok(());
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} |