2023-06: Implement part 2

2023/06-wait-for-it/src/main.rs

@@ -1,5 +1,7 @@
-mod part_one;
+//mod part_one;
+mod part_two;
 
 fn main() {
-    part_one::part_one();
+    //part_one::part_one();
+    part_two::part_two();
 }

2023/06-wait-for-it/src/part_one.rs

@@ -15,21 +15,21 @@ pub fn part_one() {
         for i in 0..race_results[0].len() {
             margin *= process_race_result(race_results[0][i], race_results[1][i]);
         }
-        
+
         println!("{:?}", margin);
     }
 }
 
 fn process_line(s: &str) -> Vec<u32> {
-    
-    let nums_str = s.split(':').collect::<Vec<&str>>()[1].split_whitespace().collect::<Vec<&str>>();
+    let nums_str = s.split(':').collect::<Vec<&str>>()[1]
+        .split_whitespace()
+        .collect::<Vec<&str>>();
     let nums: Vec<u32> = nums_str.iter().map(|s| s.parse::<u32>().unwrap()).collect();
 
-    return nums;    
+    return nums;
 }
 
 fn process_race_result(time: u32, distance: u32) -> u32 {
-    
     let mut win_count = 0;
 
     for i in 0..time {
@@ -41,11 +41,10 @@ fn process_race_result(time: u32, distance: u32) -> u32 {
     return win_count;
 }
 
-
 fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
 where
     P: AsRef<Path>,
 {
     let file = File::open(filename)?;
     Ok(io::BufReader::new(file).lines())
-}
+}

2023/06-wait-for-it/src/part_two.rs

@@ -0,0 +1,47 @@
+use std::fs::File;
+use std::io::{self, BufRead};
+use std::path::Path;
+
+pub fn part_two() {
+    if let Ok(lines) = read_lines("./input.txt") {
+        let mut race_result: Vec<u64> = Vec::new();
+
+        for line in lines {
+            race_result.push(process_line(&line.unwrap()));
+        }
+
+        let win_count = process_race_result(race_result[0], race_result[1]);
+
+        println!("{:?}", win_count);
+    }
+}
+
+fn process_line(s: &str) -> u64 {
+    let nums_str = s.split(':').collect::<Vec<&str>>()[1]
+        .split_whitespace()
+        .collect::<Vec<&str>>()
+        .concat();
+    let num: u64 = nums_str.parse::<u64>().unwrap();
+
+    return num;
+}
+
+fn process_race_result(time: u64, distance: u64) -> u64 {
+    let mut win_count = 0;
+
+    for i in 0..time {
+        if i * (time - i) > distance {
+            win_count += 1;
+        }
+    }
+
+    return win_count;
+}
+
+fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
+where
+    P: AsRef<Path>,
+{
+    let file = File::open(filename)?;
+    Ok(io::BufReader::new(file).lines())
+}