Day 1 done

This commit is contained in:
Dylan Thies
2023-12-01 22:27:47 -05:00
parent c5f92ec1bc
commit ac6662445d
4 changed files with 62 additions and 40 deletions

View File

@@ -1,3 +1,2 @@
pub mod part1; pub mod part1;
pub mod part2; pub mod part2;

View File

@@ -5,7 +5,7 @@ use day_1::part2::part2;
fn main() { fn main() {
let input = include_str!("./input.txt"); let input = include_str!("./input.txt");
let (_,part1_result) = part1(input).unwrap(); let (_, part1_result) = part1(input).unwrap();
println!("part 1: {part1_result}"); println!("part 1: {part1_result}");
let part2_result = part2(input); let part2_result = part2(input);
println!("part 2: {part2_result}"); println!("part 2: {part2_result}");

View File

@@ -1,14 +1,32 @@
use nom::{multi::{separated_list1}, self, character::complete::{alphanumeric1, newline}}; use nom::{
self,
character::complete::{alphanumeric1, newline},
multi::separated_list1,
};
pub fn part1(input: &str) -> nom::IResult<&str,String> { pub fn part1(input: &str) -> nom::IResult<&str, String> {
let (_, values) = parse_input(input)?; let (_, values) = parse_input(input)?;
println!("{values:?}"); println!("{values:?}");
Ok(("", values.iter().map(|v| v.first().unwrap() * 10 + v.last().unwrap() ).sum::<u32>().to_string())) Ok((
"",
values
.iter()
.map(|v| v.first().unwrap() * 10 + v.last().unwrap())
.sum::<u32>()
.to_string(),
))
} }
fn parse_input(input: &str) -> nom::IResult<&str, Vec<Vec<u32>>> { fn parse_input(input: &str) -> nom::IResult<&str, Vec<Vec<u32>>> {
let (i, j) = separated_list1(newline, alphanumeric1)(input)?; let (i, j) = separated_list1(newline, alphanumeric1)(input)?;
let res = j.iter().map(|v| v.chars().filter_map(|x| x.to_digit(10)).collect::<Vec<u32>>()).collect::<Vec<Vec<u32>>>(); let res = j
.iter()
.map(|v| {
v.chars()
.filter_map(|x| x.to_digit(10))
.collect::<Vec<u32>>()
})
.collect::<Vec<Vec<u32>>>();
Ok((i, res)) Ok((i, res))
} }
@@ -25,4 +43,5 @@ treb7uchet";
fn part1_works() { fn part1_works() {
let (_, result) = part1(INPUT).unwrap(); let (_, result) = part1(INPUT).unwrap();
assert_eq!(result, "142".to_string()); assert_eq!(result, "142".to_string());
}} }
}

View File

@@ -1,43 +1,46 @@
pub fn part2(input: &str) -> String { pub fn part2(input: &str) -> String {
let values = input.lines().map(parse_line).collect::<Vec<Vec<u32>>>(); let values = input.lines().map(parse_line).collect::<Vec<Vec<u32>>>();
println!("{values:?}"); println!("{values:?}");
values.iter().map(|v| v.first().unwrap() * 10 + v.last().unwrap() ).sum::<u32>().to_string() values
.iter()
.map(|v| v.first().unwrap() * 10 + v.last().unwrap())
.sum::<u32>()
.to_string()
} }
fn parse_line(line: &str) -> Vec<u32> { fn parse_line(line: &str) -> Vec<u32> {
(0..line.len()).filter_map(|index| { (0..line.len())
let reduced_line = &line[index..]; .filter_map(|index| {
let result = if reduced_line.starts_with("one") { let reduced_line = &line[index..];
Some(1) let result = if reduced_line.starts_with("one") {
} else if reduced_line.starts_with("two"){ Some(1)
Some(2) } else if reduced_line.starts_with("two") {
} else if reduced_line.starts_with("three"){ Some(2)
Some(3) } else if reduced_line.starts_with("three") {
} else if reduced_line.starts_with("four"){ Some(3)
Some(4) } else if reduced_line.starts_with("four") {
} else if reduced_line.starts_with("five"){ Some(4)
Some(5) } else if reduced_line.starts_with("five") {
} else if reduced_line.starts_with("six"){ Some(5)
Some(6) } else if reduced_line.starts_with("six") {
} else if reduced_line.starts_with("seven"){ Some(6)
Some(7) } else if reduced_line.starts_with("seven") {
} else if reduced_line.starts_with("eight"){ Some(7)
Some(8) } else if reduced_line.starts_with("eight") {
} else if reduced_line.starts_with("nine"){ Some(8)
Some(9) } else if reduced_line.starts_with("nine") {
} else if reduced_line.starts_with("zero"){ Some(9)
Some(0) } else if reduced_line.starts_with("zero") {
} else { Some(0)
reduced_line.chars().next().unwrap().to_digit(10) } else {
}; reduced_line.chars().next().unwrap().to_digit(10)
};
result result
})
}).collect() .collect()
} }
#[cfg(test)] #[cfg(test)]
mod test { mod test {
use super::*; use super::*;
@@ -52,6 +55,7 @@ zoneight234
#[test] #[test]
fn part2_works() { fn part2_works() {
let result = part2(INPUT); let result = part2(INPUT);
assert_eq!(result, "281".to_string()); assert_eq!(result, "281".to_string());
}} }
}