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Optimized day 5 part 2

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This commit is contained in:
Ishan Jain 2022-12-05 13:43:03 +05:30
parent 64c566cc6f
commit ad8184a3d2
Signed by: ishan
GPG Key ID: 0506DB2A1CC75C27
1 changed files with 26 additions and 15 deletions
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41
src/main.rs
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@ -58,29 +58,40 @@ fn parse(input: &[u8]) -> Stack {
let mut instructions = vec![];
while let Some(l) = line {
let l: Vec<u8> = l
let mut output = vec![];
for &c in l
.iter()
.filter(|&c| (b'0'..=b'9').contains(c) || c == &b' ')
.cloned()
.collect();
{
if c == b' ' && output.last().map_or(true, |&c| c == b' ') {
continue;
}
output.push(c);
}
if l.is_empty() {
if output.is_empty() {
break;
}
let numbers: Vec<u8> = l
.split(|&c| c == b' ')
.filter(|c| !c.is_empty())
.map(|c| {
c.get(1)
.map_or(c[0] - b'0', |a| (c[0] - b'0') * 10 + a - b'0')
})
.collect();
let mut input = output.splitn(2, |&c| c == b' ');
let e1 = input.next().map_or(0, |c| {
c.get(1)
.map_or(c[0] - b'0', |a| (c[0] - b'0') * 10 + a - b'0')
});
let mut input = input.next().unwrap().splitn(2, |&c| c == b' ');
let e2 = input.next().map_or(0, |c| {
c.get(1)
.map_or(c[0] - b'0', |a| (c[0] - b'0') * 10 + a - b'0')
});
let e3 = input.next().map_or(0, |c| {
c.get(1)
.map_or(c[0] - b'0', |a| (c[0] - b'0') * 10 + a - b'0')
});
instructions.push(Instruction {
count: numbers[0] as usize,
from: numbers[1] as usize,
to: numbers[2] as usize,
count: e1 as usize,
from: e2 as usize,
to: e3 as usize,
});
if let Some(r) = rest {