diff --git a/day01/js/index.mjs b/day01/js/index.mjs
deleted file mode 100644
index 0030cf5..0000000
--- a/day01/js/index.mjs
+++ /dev/null
@@ -1,24 +0,0 @@
-import * as readline from 'node:readline';
-import * as fs from 'node:fs';
-
-
-const data = [];
-const rl = readline.createInterface({ 
-    input: fs.createReadStream('./input') 
-});
-
-for await (const line of rl) {
-    data.push(parseInt(line, 10));
-}
-
-
-let last = null;
-let part1 = 0;
-
-for (const v in data) {
-    if (last !== null && v > last) counter++;
-    last = v;    
-}
-
-console.log('part1', part1);
-
diff --git a/day03/src/main.rs b/day03/src/main.rs
index e5fc9d3..718d1c7 100644
--- a/day03/src/main.rs
+++ b/day03/src/main.rs
@@ -3,29 +3,67 @@ use std::fs;
 const MAX_BITS: usize = 12;
 
 fn main() {
-    let mut true_count: [ u16 ; MAX_BITS ] = [ 0 ; MAX_BITS ];
-    let mut line_count: u16 = 0;
-    let data = fs::read_to_string("./data/input").expect("Unable to read file");
+    let input = fs::read_to_string("./data/input").expect("Unable to read file");
+    let data = parse(&input);
 
-    for line in data.lines() {
-        let str_rev: String = line.chars().rev().collect();
-        for (pos, chr) in str_rev.chars().enumerate() {
-            if chr == '1' { 
-                true_count[pos] += 1 
-            }
-        }
-        line_count += 1;
-    }
+    task1(&data);
+
+    task2(&data); 
+}
+
+fn task2(data: &Vec<Vec<bool>>) {
+    let a = filter_by_first_bit_n(data, true, 0);
+
+    println!("{:?}", a);
+}
+
+fn task1(data: &Vec<Vec<bool>>) {
+    let trues = count(&data, true);
 
-    let even_count = line_count / 2;
     let mut gamma: u32 = 0;
     let mut epsilon: u32 = 0;
-    for (pos, true_count) in true_count.iter_mut().enumerate() {
-        if *true_count > even_count {
-            gamma += (2 as u32).pow(pos as u32);
+    for (pos, true_count) in trues.iter().enumerate() {
+        let exp: u32 = (MAX_BITS - pos - 1) as u32;
+        if *true_count > data.len() as u16 / 2 {
+            gamma += (2 as u32).pow(exp);
         } else {
-            epsilon += (2 as u32).pow(pos as u32);
+            epsilon += (2 as u32).pow(exp);
         }
     }
-    println!("power consumption {}", epsilon * gamma)
+    println!("power consumption {}", epsilon * gamma);
 }
+
+fn filter_by_first_bit_n(data: &Vec<Vec<bool>>, value: bool, n: usize) -> Vec<bool> {
+    let result: Vec<Vec<bool>> = data.iter().filter(|v| v[n] == value).cloned().collect();
+
+    if result.len() == 1 {
+        return result[0].clone();
+    }
+
+    return filter_by_first_bit_n(&result, value, n+1);
+}
+
+fn parse(data: &String) -> Vec<Vec<bool>> {
+    let mut result: Vec<Vec<bool>> = vec![];
+    for line in data.lines() {
+        let thing: Vec<bool> = line.chars()
+            .map(|v| if v == '1' { return true } else { return  false })
+            .collect();
+
+        result.push(thing);
+    }
+
+    return result;
+}
+
+fn count(data: &Vec<Vec<bool>>, value: bool) -> Vec<u16> {
+    let mut result = vec![0 ; data[0].len()];
+    for item in data.iter() {
+        for (pos, v) in item.iter().enumerate() {
+            if *v == value { result[pos] += 1 }
+        }
+    }
+
+    return result;
+}
+