day7 part2

day07/src/main.rs

@@ -8,13 +8,23 @@ fn main() {
 
     for line in 0..input.len() {
         let hand = input[line][0];
+        if hand == "JJJJJ" {
+            input[line].push("7");
+            continue;
+        }
         let mut card_freq: HashMap<char, i16> = HashMap::new();
-        for card in hand.chars() {
+        let joker_count: i16 = hand.chars().filter(|c| c == &'J').count().try_into().unwrap();
+        for card in hand.chars().filter(|c| c != &'J') {
             card_freq.entry(card)
                 .and_modify(|count| *count += 1)
                 .or_insert(1);
         }
 
+        // The most helpful place for the jokers will always be with the max card count
+        let max = card_freq.clone().into_iter().max_by(|a, b| a.1.cmp(&b.1)).unwrap();
+        card_freq.entry(max.0)
+            .and_modify(|count| *count += joker_count);
+
         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();
@@ -71,16 +81,103 @@ fn card_value(card: char) -> i32 {
         '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,
+        'T' => 10,
+        '9' => 9,
+        '8' => 8,
+        '7' => 7,
+        '6' => 6,
+        '5' => 5,
+        '4' => 4,
+        '3' => 3,
+        '2' => 2,
+        'J' => 1,
         _ => panic!("invalid card")
     }
-}
+}
+
+// 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")
+//     }
+// }