anthonycicc/advent-of-code-2021
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Day 3 Part 1 (Less gross? but still gross)

Browse source
This commit is contained in:
Anthony Cicchetti 2021-12-03 15:33:20 -05:00
parent 6fc612a203
commit e36ae7962b
1 changed files with 17 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

32
day_03/src/lib.rs
View file

@ -43,12 +43,25 @@ fn parse_input(input: &str) -> Vec<usize> {
/// Use the binary numbers in your diagnostic report to calculate the gamma rate and epsilon rate, then multiply them together. What is the power consumption of the submarine? (Be sure to represent your answer in decimal, not binary.)
pub fn part1(input: &str) -> usize {
let input = parse_input(input);
let frequency_pairs = dbg!(create_frequency_pairs(input));
let mut out_str = String::new();
for entry in frequency_pairs {
if entry.0 > entry.1 {
out_str.push_str("0");
} else {
out_str.push_str("1");
}
}
let gamma = usize::from_str_radix(&out_str, 2).unwrap();
let epsilon = gamma.bitxor(0b1111_1111_1111);
gamma * epsilon
}
fn create_frequency_pairs(inp: Vec<usize>) -> Vec<(usize, usize)> {
let mut frequency: Vec<(usize, usize)> = vec![(0, 0); 12];
for i in input {
for i in inp {
let a = format!("{:012b}", i);
dbg!(&a);
for (idx, cha) in a.chars().into_iter().enumerate() {
dbg!(idx);
let mut entry = unsafe { frequency.get_unchecked_mut(idx) };
if cha == '0' {
entry.0 += 1
@ -57,18 +70,7 @@ pub fn part1(input: &str) -> usize {
}
}
}
dbg!(&frequency);
let mut out_str = String::new();
for entry in frequency {
if entry.0 > entry.1 {
out_str = format!("{}0", out_str);
} else {
out_str = format!("{}1", out_str);
}
}
let gamma = usize::from_str_radix(&out_str, 2).unwrap();
let epsilon = gamma.bitxor(0b1111_1111_1111);
gamma * epsilon
frequency
}
/// Next, you should verify the life support rating, which can be determined by multiplying the oxygen generator rating by the CO2 scrubber rating.