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aoc2022
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Added day 8 part 2

This commit is contained in:
Ishan Jain 2022-12-08 11:42:30 +05:30
parent 289eb2180b
commit ac3e6c43bc
Signed by: ishan
GPG Key ID: 0506DB2A1CC75C27
1 changed files with 29 additions and 42 deletions
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71
src/main.rs
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@ -32,51 +32,38 @@ fn solution(input: Vec<Vec<u8>>) -> usize {
for i in 0..m {
for j in 0..n {
match (i, j) {
(0, _) => answer += 1,
(_, 0) => answer += 1,
(_, j) if j == n - 1 => answer += 1,
(i, _) if i == m - 1 => answer += 1,
let th = input[i][j];
_ => {
let th = input[i][j];
// l to r check
if input[i][0..j].iter().all(|&h| h < th) {
answer += 1;
continue;
}
// r to l check
if input[i][j + 1..n].iter().all(|&h| h < th) {
answer += 1;
continue;
}
let mut visible = true;
for row in &input[0..i] {
if row[j] >= th {
visible = false;
break;
}
}
if visible {
answer += 1;
continue;
}
visible = true;
for row in &input[i + 1..m] {
if row[j] >= th {
visible = false;
break;
}
}
if visible {
answer += 1;
}
let mut counts = [0, 0, 0, 0];
for &v in input[i][0..j].iter().rev() {
counts[0] += 1;
if v >= th {
break;
}
}
for &v in &input[i][j + 1..n] {
counts[1] += 1;
if v >= th {
break;
}
}
for row in input[0..i].iter().rev() {
counts[2] += 1;
if row[j] >= th {
break;
}
}
for row in &input[i + 1..m] {
counts[3] += 1;
if row[j] >= th {
break;
}
}
answer = std::cmp::max(answer, counts[0] * counts[1] * counts[2] * counts[3]);
}
}