From 6bd170cbdecb2a65c7184048187b36b2995f97cf Mon Sep 17 00:00:00 2001
From: Luke Else <mail@luke-else.co.uk>
Date: Mon, 4 Dec 2023 07:40:07 +0000
Subject: [PATCH] Got slightly confused on part 2... nearly there

---
 src/solutions/day04.rs | 59 +++++++++++++++++++++---------------------
 1 file changed, 30 insertions(+), 29 deletions(-)

diff --git a/src/solutions/day04.rs b/src/solutions/day04.rs
index 2d707f8..26b5ef3 100644
--- a/src/solutions/day04.rs
+++ b/src/solutions/day04.rs
@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use std::{borrow::BorrowMut, collections::HashMap};
 
 use super::Solution;
 
@@ -16,40 +16,41 @@ impl Solution for Day04 {
             .collect();
         let mut ans = 0;
 
-        for cards in cards {
-            let mut winning_numbers: HashMap<u32, bool> = HashMap::new();
-            let mut sep_found = false;
-            let mut card_nums = vec![];
-
-            for num in cards.split_whitespace() {
-                // Are we after the |
-                if num == "|" {
-                    sep_found = true;
-                    continue;
-                }
-                let num = num.parse::<u32>()?;
-
-                if sep_found {
-                    if winning_numbers.contains_key(&num) {
-                        card_nums.push(num);
-                    }
-                } else {
-                    winning_numbers.insert(num, true);
-                }
-            }
-            if !card_nums.is_empty() {
-                ans += 2u32.pow((card_nums.len() - 1) as u32);
+        for card in cards {
+            let winning_nums = self.get_count_winning_numbers(card)?;
+            if winning_nums > 0 {
+                ans += 2u32.pow((winning_nums - 1) as u32);
             }
         }
-
         Ok(Box::new(ans))
     }
 
     fn part2(
         &self,
-        _input: &mut Vec<String>,
+        input: &mut Vec<String>,
     ) -> Result<Box<dyn std::fmt::Display>, Box<dyn std::error::Error>> {
-        Ok(Box::new("Ready"))
+        // Remove Card XXX: at start and append card index
+        let mut cards: Vec<(usize, &str)> = input
+            .iter()
+            .map(|c| c.split(":").into_iter().last().unwrap())
+            .into_iter()
+            .enumerate()
+            .collect();
+
+        for card in cards {}
+        // for (i, card) in cards.iter() {
+        //     let winning_nums = self.get_count_winning_numbers(card)?;
+        //     if winning_nums == 0 {
+        //         continue;
+        //     }
+        //     for c in cards.clone()[(i + 1)..=(i + 1 + winning_nums)].iter() {
+        //         cards.push(c.clone());
+        //     }
+        // }
+        // for i in cards.clone() {
+        //     println!("{:?}", i);
+        // }
+        Ok(Box::new(cards.len()))
     }
 
     fn get_day(&self) -> u8 {
@@ -58,7 +59,7 @@ impl Solution for Day04 {
 }
 
 impl Day04 {
-    fn get_count_winning_numbers(card: &str) -> Result<usize, Box<dyn std::error::Error>> {
+    fn get_count_winning_numbers(&self, card: &str) -> Result<usize, Box<dyn std::error::Error>> {
         let mut winning_numbers: HashMap<u32, bool> = HashMap::new();
         let mut sep_found = false;
         let mut card_nums = vec![];
@@ -120,6 +121,6 @@ mod test {
             .unwrap()
             .to_string();
 
-        assert_eq!(answer, "Ready");
+        assert_eq!(answer, "30");
     }
 }