Added day 1

2023/day-01/AngelOnFira/day1.rs

@@ -0,0 +1,150 @@
+use itertools::Itertools;
+
+#[aoc(day1, part1)]
+pub fn solve_part1(input: &str) -> i32 {
+    //     1abc2
+    // pqr3stu8vwx
+    // a1b2c3d4e5f
+    // treb7uchet
+
+    // Find the first and last digit in the string, put them into a single number,
+    // and add all numbers together. Check if it's a number before converting
+    input
+        .lines()
+        .map(|line| {
+            dbg!(&line);
+            let numbers = line.chars().filter_map(|c| c.to_digit(10)).collect_vec();
+            dbg!(&numbers);
+            // Combine the first and last number
+            let first = numbers.first().unwrap();
+
+            // If there is no last digit, use the first digit
+            let last = numbers.last().unwrap();
+            let combined = format!("{}{}", first, last).parse::<i32>().unwrap();
+
+            combined
+        })
+        .sum::<i32>()
+}
+
+#[aoc(day1, part2)]
+pub fn solve_part2(input: &str) -> i32 {
+    // This time, sometimes the number might be spelled out. First, replace all
+    // the occurances in strings
+
+    // two1nine
+    // eightwothree
+    // abcone2threexyz
+    // xtwone3four
+    // 4nineeightseven2
+    // zoneight234
+    // 7pqrstsixteen
+    input
+        .lines()
+        .map(|line| {
+            dbg!(&line);
+
+            // Change one to 1, two to 2, etc. This needs to be done with the
+            // first occurance of any number being removed, not just the first
+            // in the list. Use regex if needed
+            let mut new_string = String::new();
+
+            let mut first = 0;
+
+            for char in line.chars() {
+                new_string.push(char);
+
+                // If it's a number, we found the first number
+                if char.is_digit(10) {
+                    first = char.to_digit(10).unwrap();
+                    break;
+                }
+
+                // If we find any of the words, replace them with the number and
+                // return
+                if new_string.contains("one") {
+                    first = 1;
+                    break;
+                } else if new_string.contains("two") {
+                    first = 2;
+                    break;
+                } else if new_string.contains("three") {
+                    first = 3;
+                    break;
+                } else if new_string.contains("four") {
+                    first = 4;
+                    break;
+                } else if new_string.contains("five") {
+                    first = 5;
+                    break;
+                } else if new_string.contains("six") {
+                    first = 6;
+                    break;
+                } else if new_string.contains("seven") {
+                    first = 7;
+                    break;
+                } else if new_string.contains("eight") {
+                    first = 8;
+                    break;
+                } else if new_string.contains("nine") {
+                    first = 9;
+                    break;
+                }
+            }
+
+            let mut last = -1;
+            let mut new_string = String::new();
+            for char in line.chars().rev() {
+                new_string.insert(0, char);
+                // If it's a number, we found the last number
+                if char.is_digit(10) {
+                    last = char.to_digit(10).unwrap() as i32;
+                    break;
+                }
+
+                // If we find any of the words, replace them with the number and
+                // return
+                if new_string.contains("one") {
+                    last = 1;
+                    break;
+                } else if new_string.contains("two") {
+                    last = 2;
+                    break;
+                } else if new_string.contains("three") {
+                    last = 3;
+                    break;
+                } else if new_string.contains("four") {
+                    last = 4;
+                    break;
+                } else if new_string.contains("five") {
+                    last = 5;
+                    break;
+                } else if new_string.contains("six") {
+                    last = 6;
+                    break;
+                } else if new_string.contains("seven") {
+                    last = 7;
+                    break;
+                } else if new_string.contains("eight") {
+                    last = 8;
+                    break;
+                } else if new_string.contains("nine") {
+                    last = 9;
+                    break;
+                }
+            }
+
+            // If there is no last digit, use the first digit
+            let last = if last == -1 { first } else { last as u32 };
+            let combined = format!("{}{}", first, last).parse::<i32>().unwrap();
+
+            combined
+        })
+        .sum::<i32>()
+}
+
+#[cfg(test)]
+mod tests {
+    // use super::solve_part1 as part1;
+    // use super::solve_part2 as part2;
+}