dqnid/code-advent-2024
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day 2: problem dampener fixed

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This commit is contained in:
Daniel Heras Quesada
2024-12-04 11:13:46 +01:00
parent ce8053f0ba
commit a57e95b932
1 changed files with 9 additions and 10 deletions
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17
src/advent_of_code/mon_02.rs
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@@ -24,7 +24,7 @@ pub fn check_reports_safety(input: &str) -> ReportSafety {
fn is_report_safe(report: &Report, apply_problem_dampener: bool) -> bool { fn is_report_safe(report: &Report, apply_problem_dampener: bool) -> bool {
if report.len() < 2 { if report.len() < 2 {
return false; return true;
} }
let mut safe = true; let mut safe = true;
let initial_direction: ReportDirection = get_report_direction(&report[0..=1]); let initial_direction: ReportDirection = get_report_direction(&report[0..=1]);
@@ -32,15 +32,14 @@ fn is_report_safe(report: &Report, apply_problem_dampener: bool) -> bool {
'report_check: for index in 1..report.len() { 'report_check: for index in 1..report.len() {
if !is_level_pair_valid(&report[index - 1], &report[index], &initial_direction) { if !is_level_pair_valid(&report[index - 1], &report[index], &initial_direction) {
if apply_problem_dampener { if apply_problem_dampener {
let sliced_index_report = for internal_index in 0..report.len() {
[&report[0..index], &report[index + 1..report.len()]].concat(); let sliced_index_report = [
&report[0..internal_index],
&report[internal_index + 1..report.len()],
]
.concat();
if is_report_safe(&sliced_index_report, false) { if is_report_safe(&sliced_index_report, false) {
break 'report_check; break 'report_check;
} else {
let sliced_prev_report =
[&report[0..index - 1], &report[index..report.len()]].concat();
if is_report_safe(&sliced_prev_report, false) {
break 'report_check;
} }
} }
} }
@@ -56,7 +55,7 @@ fn is_level_pair_valid(first: &Level, second: &Level, initial_direction: &Report
let distance = calc_distance(*second, *first); let distance = calc_distance(*second, *first);
let direction = get_report_direction(&[*first, *second]); let direction = get_report_direction(&[*first, *second]);
!(first == second || distance < 1 || distance > 3 || direction != *initial_direction) !(distance < 1 || distance > 3 || direction != *initial_direction)
} }
// FIXME: this is not a good function, since may try to access an invalid index // FIXME: this is not a good function, since may try to access an invalid index