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Author SHA1 Message Date
4a20a35c2d
day7 past1 2023-12-07 12:30:46 -05:00
8272d3b62c
cange folder names 2023-12-07 12:30:36 -05:00
28 changed files with 1101 additions and 0 deletions

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7
day07/Cargo.lock generated Normal file
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# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "day07"
version = "0.1.0"

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day07/Cargo.toml Normal file
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[package]
name = "day07"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

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day07/input.txt Normal file

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day07/src/main.rs Normal file
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use std::{fs, collections::HashMap};
fn main() {
let input = fs::read_to_string("input.txt").unwrap();
let mut input: Vec<_> = input.split('\n')
.map(|line| line.split(' ').collect::<Vec<_>>())
.collect();
for line in 0..input.len() {
let hand = input[line][0];
let mut card_freq: HashMap<char, i16> = HashMap::new();
for card in hand.chars() {
card_freq.entry(card)
.and_modify(|count| *count += 1)
.or_insert(1);
}
let mut set_count: HashMap<i16, i16> = HashMap::new();
for i in 1..=5 {
let card_count = card_freq.values().filter(|x| **x == i).count().try_into().unwrap();
if card_count != 0 {
set_count.insert(i, card_count);
}
}
let power = match set_count {
x if x.contains_key(&5) => "7",
x if x.contains_key(&4) => "6",
x if x.contains_key(&3) && x.contains_key(&2) => "5",
x if x.contains_key(&3) => "4",
x if x.get(&2).unwrap_or(&0) >= &2 => "3",
x if x.get(&2).unwrap_or(&0) == &1 => "2",
HashMap { .. } => "1"
};
input[line].push(power);
}
input.sort_by(|lhs, rhs| {
let lhs_power: i32 = lhs[2].parse().unwrap();
let rhs_power: i32 = rhs[2].parse().unwrap();
if lhs_power != rhs_power {
return lhs_power.cmp(&rhs_power);
}
let lhs_hand: Vec<i32> = lhs[0].chars().map(card_value).collect();
let rhs_hand: Vec<i32> = rhs[0].chars().map(card_value).collect();
for i in 0..5 {
if lhs_hand[i] == rhs_hand[i] { continue; }
return lhs_hand[i].cmp(&rhs_hand[i]);
}
panic!("Should not be reachable");
});
let mut total_winnings = 0;
for i in 0..input.len() {
let bid: usize = input[i][1].parse().unwrap();
total_winnings += (i + 1) * bid;
}
println!("{}", total_winnings);
}
fn card_value(card: char) -> i32 {
match card {
'A' => 13,
'K' => 12,
'Q' => 11,
'J' => 10,
'T' => 9,
'9' => 8,
'8' => 7,
'7' => 6,
'6' => 5,
'5' => 4,
'4' => 3,
'3' => 2,
'2' => 1,
_ => panic!("invalid card")
}
}