From 46550e1e79ada56e8c80c289f1103b9d85455593 Mon Sep 17 00:00:00 2001
From: Nat Lasseter <user@4574.co.uk>
Date: Thu, 7 Dec 2023 14:42:19 +0000
Subject: Day 07 part 1

---
 day07/day07.java | 163 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 day07/day07.java

(limited to 'day07/day07.java')

diff --git a/day07/day07.java b/day07/day07.java
new file mode 100644
index 0000000..3f4ae88
--- /dev/null
+++ b/day07/day07.java
@@ -0,0 +1,163 @@
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+
+public class day07 {
+  public static void main(String args[]) throws IOException {
+    RandomAccessFile input = new RandomAccessFile("input", "r");
+    System.out.println("Day 07 Part 1: " + part1(input));
+    input.seek(0);
+    System.out.println("Day 07 Part 2: " + part2(input));
+    input.close();
+  }
+
+  public static String part1(RandomAccessFile input) throws IOException {
+    Game game = new Game();
+
+    String line;
+    while((line = input.readLine()) != null) {
+      game.parseHand(line);
+    }
+
+    game.rank();
+
+    long winnings = 0;
+    for (int i = 0; i < game.hands.size(); i++) {
+      winnings += ((i+1) * game.hands.get(i).bid);
+    }
+
+    return Long.toString(winnings);
+  }
+
+  public static String part2(RandomAccessFile input) throws IOException {
+    return "WIP";
+  }
+}
+
+class Game {
+  ArrayList<Hand> hands;
+
+  public Game() {
+    this.hands = new ArrayList<>();
+  }
+
+  public void parseHand(String line) {
+    String[] linea = line.split(" +");
+    this.hands.add(
+      new Hand(
+        linea[0].toCharArray(),
+        Long.parseLong(linea[1])
+      )
+    );
+  }
+
+  public void rank() {
+    Collections.sort(hands);
+  }
+}
+
+class Hand implements Comparable<Hand> {
+  int[] cards;
+  long bid;
+
+  public Hand(char[] cards, long bid) {
+    this.cards = new int[5];
+    for(int i = 0; i < 5; i++) {
+      switch (cards[i]) {
+        case '2':
+          this.cards[i] = 2;
+          break;
+        case '3':
+          this.cards[i] = 3;
+          break;
+        case '4':
+          this.cards[i] = 4;
+          break;
+        case '5':
+          this.cards[i] = 5;
+          break;
+        case '6':
+          this.cards[i] = 6;
+          break;
+        case '7':
+          this.cards[i] = 7;
+          break;
+        case '8':
+          this.cards[i] = 8;
+          break;
+        case '9':
+          this.cards[i] = 9;
+          break;
+        case 'T':
+          this.cards[i] = 10;
+          break;
+        case 'J':
+          this.cards[i] = 11;
+          break;
+        case 'Q':
+          this.cards[i] = 12;
+          break;
+        case 'K':
+          this.cards[i] = 13;
+          break;
+        case 'A':
+          this.cards[i] = 14;
+          break;
+      }
+    }
+    this.bid = bid;
+  }
+
+  public int compareTo(Hand other) {
+    if (this.type() > other.type()) {
+      return 1;
+    } else if (this.type() < other.type()) {
+      return -1;
+    }
+    for (int i = 0; i < 5; i++) {
+      if (this.cards[i] > other.cards[i]) {
+        return 1;
+      } else if (this.cards[i] < other.cards[i]) {
+        return -1;
+      }
+    }
+    return 0;
+  }
+
+  private int type() {
+    int[] s = this.cards.clone();
+    Arrays.sort(s);
+
+    if (
+        s[0] == s[1] && s[1] == s[2] && s[2] == s[3] && s[3] == s[4] ) {
+      return 6;
+    } else if (
+        s[0] == s[1] && s[1] == s[2] && s[2] == s[3] ||
+        s[1] == s[2] && s[2] == s[3] && s[3] == s[4] ) {
+      return 5;
+    } else if (
+        s[0] == s[1]    &&    s[2] == s[3] && s[3] == s[4] ||
+        s[0] == s[1] && s[1] == s[2]    &&    s[3] == s[4] ) {
+      return 4;
+    } else if (
+        s[0] == s[1] && s[1] == s[2] ||
+        s[1] == s[2] && s[2] == s[3] ||
+        s[2] == s[3] && s[3] == s[4] ) {
+      return 3;
+    } else if (
+        s[0] == s[1] && s[2] == s[3] ||
+        s[0] == s[1] && s[3] == s[4] ||
+        s[1] == s[2] && s[3] == s[4] ) {
+      return 2;
+    } else if (
+        s[0] == s[1] ||
+        s[1] == s[2] ||
+        s[2] == s[3] ||
+        s[3] == s[4] ){
+      return 1;
+    }
+    return 0;
+  }
+}
-- 
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