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repo: create structure for next days
+68
-22
+4
-22
src/main.rs
+4
-22
src/main.rs
···
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use std::fs;
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mod solutions;
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struct Result {
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sum: i32,
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times_crossed: i32,
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}
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use solutions::Day1;
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fn main() {
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let content = fs::read_to_string("inputs/1.txt").expect("failed to read input file");
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let res = content.lines().fold(
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Result {
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sum: 50,
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times_crossed: 0,
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},
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|mut acc, line| {
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let n: i32 = line[1..].parse().unwrap();
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let old = acc.sum;
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acc.sum += if &line[..1] == "L" { -n } else { n };
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acc.times_crossed += (old > 0 && acc.sum < 0) as i32
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+ if acc.sum == 0 { 1 } else { (acc.sum / 100).abs() };
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acc.sum = acc.sum.rem_euclid(100);
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acc
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},
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);
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println!("result: {}", res.times_crossed);
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let day1 = Day1::new("inputs/1.txt");
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println!("Part 1: {}, Part 2: {}", day1.part1(), day1.part2());
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}
+62
src/solutions/day1.rs
+62
src/solutions/day1.rs
···
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use std::fs;
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pub struct Day1 {
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data: String,
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}
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struct Result {
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sum: i32,
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times_crossed: i32,
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}
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impl Day1 {
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pub fn new(path: &str) -> Self {
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Day1 {
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data: fs::read_to_string(path).expect("failed to read input file"),
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}
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}
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pub fn part1(&self) -> i32 {
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self.data
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.lines()
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.fold(
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Result {
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sum: 50,
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times_crossed: 0,
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},
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|mut acc, line| {
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let n: i32 = line[1..].parse().unwrap();
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acc.sum += if &line[..1] == "L" { -n } else { n };
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acc.sum = acc.sum.rem_euclid(100);
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acc.times_crossed += if acc.sum == 0 { 1 } else { 0 };
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acc
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},
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)
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.times_crossed
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}
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pub fn part2(&self) -> i32 {
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self.data
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.lines()
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.fold(
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Result {
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sum: 50,
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times_crossed: 0,
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},
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|mut acc, line| {
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let n: i32 = line[1..].parse().unwrap();
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let old = acc.sum;
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acc.sum += if &line[..1] == "L" { -n } else { n };
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acc.times_crossed += (old > 0 && acc.sum < 0) as i32;
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acc.times_crossed += if acc.sum == 0 {
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1
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} else {
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(acc.sum / 100).abs()
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};
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acc.sum = acc.sum.rem_euclid(100);
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acc
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},
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)
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.times_crossed
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}
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}