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Bert Peters
2021-12-22 21:16:27 +01:00
parent 2fcdc6b8d2
commit fd561a3e9d
2 changed files with 12 additions and 13 deletions
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6
2021/src/day21.rs
View File

@@ -139,11 +139,7 @@ pub fn part2(input: &mut dyn Read) -> String {
let (a_wins, a_alive) = multiverse(a);
let (b_wins, b_alive) = multiverse(b);
let a_winner: u64 = a_wins[1..]
.into_iter()
.zip(b_alive)
.map(|(&a, b)| a * b)
.sum();
let a_winner: u64 = a_wins[1..].iter().zip(b_alive).map(|(&a, b)| a * b).sum();
let b_winner: u64 = b_wins.into_iter().zip(a_alive).map(|(a, b)| a * b).sum();
a_winner.max(b_winner).to_string()

11
2021/src/day22.rs
View File

@@ -23,14 +23,17 @@ fn parse_range(input: &[u8]) -> IResult<&[u8], CRange> {
})(input)
}
fn parse_input<'a>(input: &[u8]) -> IResult<&[u8], Vec<(bool, CRange, CRange, CRange)>> {
fn parse_input(input: &[u8]) -> IResult<&[u8], Vec<(bool, [CRange; 3])>> {
let parse_state = alt((map(tag("on x="), |_| true), map(tag("off x="), |_| false)));
let parse_line = tuple((
let parse_line = map(
tuple((
parse_state,
parse_range,
preceded(tag(",y="), parse_range),
preceded(tag(",z="), parse_range),
));
)),
|(b, x, y, z)| (b, [x, y, z]),
);
separated_list1(newline, parse_line)(input)
}
@@ -45,7 +48,7 @@ pub fn part1(input: &mut dyn Read) -> String {
let ranges = read_input(input, parse_input);
for (toggle, xr, yr, zr) in ranges {
for (toggle, [xr, yr, zr]) in ranges {
for z in zr {
if !valid_range.contains(&z) {
continue;