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Optimized day 5 part 2

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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![]; let mut instructions = vec![];
while let Some(l) = line { while let Some(l) = line {
let l: Vec<u8> = l let mut output = vec![];
for &c in l
.iter() .iter()
.filter(|&c| (b'0'..=b'9').contains(c) || c == &b' ') .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; break;
} }
let numbers: Vec<u8> = l let mut input = output.splitn(2, |&c| c == b' ');
.split(|&c| c == b' ') let e1 = input.next().map_or(0, |c| {
.filter(|c| !c.is_empty()) c.get(1)
.map(|c| { .map_or(c[0] - b'0', |a| (c[0] - b'0') * 10 + a - b'0')
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| {
.collect(); 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 { instructions.push(Instruction {
count: numbers[0] as usize, count: e1 as usize,
from: numbers[1] as usize, from: e2 as usize,
to: numbers[2] as usize, to: e3 as usize,
}); });
if let Some(r) = rest { if let Some(r) = rest {