From 379a0229aefaa4f05e7d66a1d49372fb3900a812 Mon Sep 17 00:00:00 2001
From: dolphinau <alexandre.tullot@protonmail.com>
Date: Tue, 9 Dec 2025 23:29:48 +0100
Subject: [PATCH] Add day 6

---
 AoC_2025/src/days/day06.rs | 101 +++++++++++++++++++++++++++++++++++++
 AoC_2025/src/days/mod.rs   |   1 +
 AoC_2025/src/main.rs       |   1 +
 3 files changed, 103 insertions(+)
 create mode 100644 AoC_2025/src/days/day06.rs

diff --git a/AoC_2025/src/days/day06.rs b/AoC_2025/src/days/day06.rs
new file mode 100644
index 0000000..086cf00
--- /dev/null
+++ b/AoC_2025/src/days/day06.rs
@@ -0,0 +1,101 @@
+use std::{fmt::Debug, path::Display, str::Chars};
+
+use crate::days::Solution;
+
+pub enum Operation {
+    Sum,
+    Mul,
+    Unk,
+}
+
+impl From<&str> for Operation {
+    fn from(value: &str) -> Self {
+        match value {
+            "*" => Operation::Mul,
+            "+" => Operation::Sum,
+            _ => Operation::Unk,
+        }
+    }
+}
+
+impl Debug for Operation {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Sum => write!(f, "Sum"),
+            Self::Mul => write!(f, "Mul"),
+            Self::Unk => write!(f, "Unk"),
+        }
+    }
+}
+
+pub struct Day06;
+
+impl Solution for Day06 {
+    type Input = String;
+
+    fn parse(&self, data: &str) -> Self::Input {
+        data.to_owned()
+    }
+
+    fn part1(&self, input: &Self::Input) -> usize {
+        let input: Vec<Vec<&str>> = input
+            .trim()
+            .split("\n")
+            .map(|l| l.split(" ").filter(|s| !s.is_empty()).collect())
+            .collect();
+
+        let problem_count = input[0].len();
+        let problem_size = input.len() - 1;
+
+        (0..problem_count)
+            .map(|i| {
+                (
+                    input
+                        .iter()
+                        .take(problem_size)
+                        .map(|l| l[i].parse::<usize>().unwrap())
+                        .collect::<Vec<usize>>(),
+                    Operation::from(input[problem_size][i]),
+                )
+            })
+            .map(|(l, op)| match op {
+                Operation::Mul => l.iter().fold(1, |acc, x| x * acc),
+                Operation::Sum => l.iter().sum(),
+                Operation::Unk => 0,
+            })
+            .sum()
+    }
+
+    fn part2(&self, input: &Self::Input) -> usize {
+        let mut lines: Vec<String> = input.split('\n').map(|s| s.to_string()).collect();
+        let mut op_line = lines.pop().unwrap();
+
+        println!("-{}", op_line);
+
+        let mut res = 0;
+        let mut buffer = vec![0]; // Set to 0 to simulate separator column
+        while let Some(op) = op_line.pop() {
+            let x = lines
+                .iter_mut()
+                .map(|l| l.pop().unwrap())
+                .collect::<String>();
+
+            buffer.push(x.trim().parse::<usize>().unwrap_or_default());
+
+            if op != ' ' {
+                // Remove first element which is the separator column
+                _ = buffer.remove(0);
+
+                res += if op == '+' {
+                    buffer.iter().sum()
+                } else {
+                    buffer.iter().fold(1, |acc, x| x * acc)
+                };
+
+                buffer.clear();
+            }
+        }
+
+        res
+    }
+}
diff --git a/AoC_2025/src/days/mod.rs b/AoC_2025/src/days/mod.rs
index 9fe28f7..a54eb1d 100644
--- a/AoC_2025/src/days/mod.rs
+++ b/AoC_2025/src/days/mod.rs
@@ -3,6 +3,7 @@ pub mod day02;
 pub mod day03;
 pub mod day04;
 pub mod day05;
+pub mod day06;
 
 pub trait Solution {
     type Input;
diff --git a/AoC_2025/src/main.rs b/AoC_2025/src/main.rs
index 80139eb..c15eb7a 100644
--- a/AoC_2025/src/main.rs
+++ b/AoC_2025/src/main.rs
@@ -38,6 +38,7 @@ fn main() {
         3 => run(cli.day, days::day03::Day03),
         4 => run(cli.day, days::day04::Day04),
         5 => run(cli.day, days::day05::Day05),
+        6 => run(cli.day, days::day06::Day06),
         _ => {
             eprintln!("Day {:02} is not implemented yet!", cli.day);
             process::exit(1);