rusty

day-04/src/part01.rs

@@ -1,17 +1,22 @@
 use std::io;
 use std::io::BufRead;
 
-const DEBUG: bool = true;
-
 struct Card {
-    card_number: u32,
+    match_count: usize,
-    match_count: u32,
+    copies: usize,
-    copies: u32,
+}
+
+fn get_points(match_count: usize) -> usize {
+    match match_count{
+        0 => 0,
+        _ => 2_usize.pow((match_count-1).try_into().unwrap()),
+    }
 }
 
 fn main() {
     let mut lines_processed = 0;
     let mut cards: Vec<Card> = Vec::new();
+    let mut total_points: usize = 0;
 
 
     let mut line = String::new();
@@ -19,64 +24,48 @@ fn main() {
         println!("input {}", line.trim());
         let card_strings = line.trim().split_once(':').unwrap();
         //dbg!(card_strings);
-        let card_number = card_strings.0[5..].trim().parse::<u32>().unwrap();
+        //let card_number: usize = card_strings.0[5..].trim().parse::<usize>().unwrap();
         let card_data_string  = card_strings.1.trim().split_once('|').unwrap();
 
-        let winning_numbers: Vec<u32> = card_data_string.0
+        let winning_numbers: Vec<usize> = card_data_string.0
                                                           .split_whitespace()
                                                           .map(|s| s.parse().unwrap())
                                                           .collect();
-        let my_numbers: Vec<u32> = card_data_string.1
+        let my_numbers: Vec<usize> = card_data_string.1
                                                      .split_whitespace()
                                                      .map(|s| s.parse().unwrap())
                                                      .collect();
                                      
-        //dbg!(my_numbers.iter().filter(|x| winning_numbers.contains(x)).cloned().collect::<Vec<u32>>());                                                   
+        let match_count: usize = my_numbers.iter()
-        let match_count: u32 = my_numbers.iter().filter(|x| winning_numbers.contains(x)).count().try_into().unwrap();
+                                           .filter(|x| winning_numbers.contains(x))
-
+                                           .count().try_into().unwrap();
-        println!("------------ card_number: {}, match_count: {}\n", card_number, match_count);
         
+        total_points += get_points(match_count);
         cards.push(Card {
-            card_number: card_number,
             match_count: match_count,
             copies: 1,
         });
-
-        for card in cards.iter() {
-            println!("CARD card: {}, match count: {}", card.card_number, card.match_count);
-        }
-
-
-        //dbg!(winning_numbers, my_numbers, match_count);
-        //.map(|x| x.parse).unwrap())
-        //.collect()
-
-        // dbg!( card_data_string.0
-        //                       .trim()
-        //                       .split_whitespace()
-        //                       //.split(' ').map(|s| s.trim())
-        //                       .filter(|s| !s.is_empty())
-        //                       .map(|s| s.parse().unwrap())
-        //                       .collect()
-        //                       //.map(|x| x.parse).unwrap())
-        //                       //.collect()
-        //                      );
-        //let winning_numbers: Vec<u32> = card_data_string.0.trim().split_whitespace().iter().flat_map(|s| s.parse().ok()).collect();
-        let my_numbers = card_data_string.1.trim();
-
-        dbg!(card_number);
-        //dbg!(winning_numbers, my_numbers);
         lines_processed += 1;
-        line.clear()
+        line.clear();
     }
 
     println!("\n Ingested {} Lines", lines_processed);
     println!("===================================");
 
-    // Insert processing code
 
-    println!("\n Processed XXX");
+    for i in 1..cards.len() {
-    println!("===================================");
+        let current_card_match_no = cards[i-1].match_count;
-
+        let current_card_copies_no = cards[i-1].copies;
-    println!("Answer: \nXXXX");
+        //dbg!(current_card_match_no);
+        for j in 1..=current_card_match_no {
+            cards[(i-1)+j].copies += current_card_copies_no;
+        }
+    }
+
+    let total_card_copies: usize = cards.iter().map(|x| x.copies).sum();
+
+    println!("\n Processed {} Cards", cards.len());
+    println!("===================================");
+    println!("Total Points: \n{}", total_points);
+    println!("Total Cards: \n{}", total_card_copies);
 }

day-04/src/part02.rs

@@ -1,3 +1,71 @@
-fn main() {
+use std::io;
-    println!("Hello, world!");
+use std::io::BufRead;
+
+struct Card {
+    match_count: usize,
+    copies: usize,
+}
+
+fn get_points(match_count: usize) -> usize {
+    match match_count{
+        0 => 0,
+        _ => 2_usize.pow((match_count-1).try_into().unwrap()),
+    }
+}
+
+fn main() {
+    let mut lines_processed = 0;
+    let mut cards: Vec<Card> = Vec::new();
+    let mut total_points: usize = 0;
+
+
+    let mut line = String::new();
+    while io::stdin().lock().read_line(&mut line).unwrap() > 0 {
+        println!("input {}", line.trim());
+        let card_strings = line.trim().split_once(':').unwrap();
+        //dbg!(card_strings);
+        //let card_number: usize = card_strings.0[5..].trim().parse::<usize>().unwrap();
+        let card_data_string  = card_strings.1.trim().split_once('|').unwrap();
+
+        let winning_numbers: Vec<usize> = card_data_string.0
+                                                          .split_whitespace()
+                                                          .map(|s| s.parse().unwrap())
+                                                          .collect();
+        let my_numbers: Vec<usize> = card_data_string.1
+                                                     .split_whitespace()
+                                                     .map(|s| s.parse().unwrap())
+                                                     .collect();
+                                     
+        let match_count: usize = my_numbers.iter()
+                                           .filter(|x| winning_numbers.contains(x))
+                                           .count().try_into().unwrap();
+        
+        total_points += get_points(match_count);
+        cards.push(Card {
+            match_count: match_count,
+            copies: 1,
+        });
+        lines_processed += 1;
+        line.clear();
+    }
+
+    println!("\n Ingested {} Lines", lines_processed);
+    println!("===================================");
+
+
+    for i in 1..cards.len() {
+        let current_card_match_no = cards[i-1].match_count;
+        let current_card_copies_no = cards[i-1].copies;
+        //dbg!(current_card_match_no);
+        for j in 1..=current_card_match_no {
+            cards[(i-1)+j].copies += current_card_copies_no;
+        }
+    }
+
+    let total_card_copies: usize = cards.iter().map(|x| x.copies).sum();
+
+    println!("\n Processed {} Cards", cards.len());
+    println!("===================================");
+    println!("Total Points: \n{}", total_points);
+    println!("Total Cards: \n{}", total_card_copies);
 }