2023.7

4 files changed, 1112 insertions, 0 deletions

diff --git a/2023/rs/code/seven/Cargo.toml b/2023/rs/code/seven/Cargo.toml
new file mode 100644
index 0000000..152108e
--- /dev/null
+++ b/2023/rs/code/seven/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "seven"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2023/rs/code/seven/src/input.txt b/2023/rs/code/seven/src/input.txt
new file mode 100644
index 0000000..755455f
--- /dev/null
+++ b/2023/rs/code/seven/src/input.txt
@@ -0,0 +1,1000 @@
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diff --git a/2023/rs/code/seven/src/input2.txt b/2023/rs/code/seven/src/input2.txt
new file mode 100644
index 0000000..18ca35b
--- /dev/null
+++ b/2023/rs/code/seven/src/input2.txt
@@ -0,0 +1,9 @@
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diff --git a/2023/rs/code/seven/src/main.rs b/2023/rs/code/seven/src/main.rs
new file mode 100644
index 0000000..132a779
--- /dev/null
+++ b/2023/rs/code/seven/src/main.rs
@@ -0,0 +1,95 @@
+#![feature(iter_array_chunks)]
+
+use std::collections::BTreeMap;
+
+static INPUT: &str = include_str!("input.txt");
+
+static MAPPING1: &[u8] = &[
+  0,
+  b'2',
+  b'3',
+  b'4',
+  b'5',
+  b'6',
+  b'7',
+  b'8',
+  b'9',
+  b'T',
+  b'J',
+  b'Q',
+  b'K',
+  b'A'
+];
+static MAPPING2: &[u8] = &[
+  0,
+  b'J',
+  b'2',
+  b'3',
+  b'4',
+  b'5',
+  b'6',
+  b'7',
+  b'8',
+  b'9',
+  b'T',
+  b'Q',
+  b'K',
+  b'A'
+];
+
+#[derive(Ord, PartialOrd, Eq, PartialEq, Debug, Copy, Clone)]
+enum Hand {
+  HighCard = 0,
+  OnePair,
+  TwoPair,
+  ThreeOfAKind,
+  FullHouse,
+  FourOfAKind,
+  FiveOfAKind
+}
+
+fn from_analyzer(analyzer: &BTreeMap<u8, u8>) -> Hand {
+  match analyzer.len() {
+      1 => Hand::FiveOfAKind,
+      2 if analyzer.values().any(|a| *a == 4) => Hand::FourOfAKind,
+      2 => Hand::FullHouse,
+      3 if analyzer.values().any(|a| *a == 3) => Hand::ThreeOfAKind,
+      3 => Hand::TwoPair,
+      4 => Hand::OnePair,
+      5 => Hand::HighCard,
+      _ => unreachable!()
+    }
+}
+
+fn main() {
+  let valueified_1 = INPUT.split_ascii_whitespace().array_chunks::<2>().map(|[hand, bid]| {
+    let bid = bid.parse::<u32>().unwrap();
+    let mut analyzer = BTreeMap::new();
+    for c in hand.bytes() { *analyzer.entry(c).or_insert(0) += 1; }
+    let handtype = from_analyzer(&analyzer);
+    ((handtype, hand.bytes().map(|b| MAPPING1.iter().position(|i| *i == b).unwrap()).collect::<Vec<_>>()), bid)
+  });
+  let total_winnings = valueified_1.collect::<BTreeMap<_, _>>().into_iter().enumerate().map(|(n, (_, b))| (n + 1) as u32 * b).sum::<u32>();
+  println!("Total Winnings: {total_winnings}");
+
+
+  let mut valueified_2 = INPUT.split_ascii_whitespace().array_chunks::<2>().map(|[hand, bid]| {
+    let bid = bid.parse::<u32>().unwrap();
+    let mut analyzer = BTreeMap::new();
+    for c in hand.bytes() { *analyzer.entry(c).or_insert(0) += 1; }
+    let mut hand = hand.bytes().collect::<Vec<_>>();
+    if analyzer.contains_key(&b'J') {
+      let (hichar, _) = analyzer.iter().fold((0, 0), |(a, b), (c, n)| if *n > b && *c != b'J' { (*c, *n) } else { (a, b) });
+      if hichar != 0 {
+        *analyzer.get_mut(&hichar).unwrap() += analyzer[&b'J'];
+        analyzer.remove(&b'J');
+      }
+    }
+    let handtype = from_analyzer(&analyzer);
+    for c in &mut hand { *c = MAPPING2.iter().position(|i| *i == *c).unwrap() as u8 }
+    ((handtype, hand), bid)
+  }).collect::<Vec<_>>();
+  valueified_2.sort_by(|a, b| a.0.cmp(&b.0));
+  let total_winnings = valueified_2.into_iter().enumerate().map(|(n, (_, b))| (n + 1) as u32 * b).sum::<u32>();
+  println!("Total Winnings 2: {total_winnings}");
+}