day1

2023/day1/src/naive.rs

@@ -0,0 +1,28 @@
+pub fn part2(input: &str) {
+    let sum = input
+        .lines()
+        .map(|line| {
+            let line = line
+                .replace("one", "one1one")
+                .replace("two", "two2two")
+                .replace("three", "three3three")
+                .replace("four", "four4four")
+                .replace("five", "five5five")
+                .replace("six", "six6six")
+                .replace("seven", "seven7seven")
+                .replace("eight", "eight8eight")
+                .replace("nine", "nine9nine");
+            let mut chars = line.chars().filter(|c| c.is_ascii_digit());
+            let first = chars.next().unwrap();
+            let last = chars.next_back().unwrap_or(first);
+
+            [first, last]
+                .into_iter()
+                .collect::<String>()
+                .parse::<u64>()
+                .unwrap()
+        })
+        .sum::<u64>();
+
+    println!("part2: {sum}");
+}