Day 2

Cargo.toml

@@ -7,5 +7,9 @@ edition = "2024"
 name = "day1"
 path = "src/day1/main.rs"
 
+[[bin]]
+name = "day2"
+path = "src/day2/main.rs"
+
 [dependencies]
 anyhow = "1.0.100"

src/day2/day2-act.txt

@@ -0,0 +1 @@
+67562556-67743658,62064792-62301480,4394592-4512674,3308-4582,69552998-69828126,9123-12332,1095-1358,23-48,294-400,3511416-3689352,1007333-1150296,2929221721-2929361280,309711-443410,2131524-2335082,81867-97148,9574291560-9574498524,648635477-648670391,1-18,5735-8423,58-72,538-812,698652479-698760276,727833-843820,15609927-15646018,1491-1766,53435-76187,196475-300384,852101-903928,73-97,1894-2622,58406664-58466933,6767640219-6767697605,523453-569572,7979723815-7979848548,149-216

src/day2/day2-test.txt

@@ -0,0 +1 @@
+11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124

src/day2/main.rs

@@ -0,0 +1,89 @@
+use anyhow::Result;
+use std::fs;
+
+fn sol1(text: &String) {
+    let sum = text
+        .split("\n")
+        .nth(0)
+        .unwrap()
+        .split(",")
+        .filter(|s| s.len() > 0)
+        .fold(0, |sum, ids| {
+            let mut range = ids.split('-');
+            let start: i64 = range.next().unwrap().parse().unwrap();
+            let end: i64 = range.next().unwrap().parse().unwrap();
+            let mut to_sum: i64 = 0;
+            for i in start..(end + 1) {
+                // TODO maybe skip entire ones if the start and end are the same size and cannot have anything inside
+                if (i as f64).log10().ceil() as i64 % 2 == 0 {
+                    let str = i.to_string();
+                    let pivot = str.len() / 2;
+                    if str[0..pivot] == str[pivot..] {
+                        // println!("Found wrong id: {}", i);
+                        to_sum += i;
+                    }
+                }
+            }
+            sum + to_sum
+        });
+
+    println!("sol1: {}", sum);
+}
+
+fn sol2(text: &String) {
+    let sum = text
+        .split("\n")
+        .nth(0)
+        .unwrap()
+        .split(",")
+        .filter(|s| s.len() > 0)
+        .fold(0, |sum, ids| {
+            let mut range = ids.split('-');
+            let start: i64 = range.next().unwrap().parse().unwrap();
+            let end: i64 = range.next().unwrap().parse().unwrap();
+            let mut to_sum: i64 = 0;
+
+            'bigloop: for i in start..(end + 1) {
+                // println!("Started Num: {}", i);
+                let str = i.to_string();
+                let str_len = str.len();
+
+                'other_num: for test_num in 1..(str_len / 2) + 1 {
+                    if str_len % test_num != 0 {
+                        continue 'other_num;
+                    }
+                    for test_index in (test_num..str_len).step_by(test_num) {
+                        let prev = test_index - test_num;
+                        /*println!(
+                            "Testing: {} {} {} != {}",
+                            test_index,
+                            test_num,
+                            str[prev..prev + test_num].to_owned(),
+                            str[test_index..test_index + test_num].to_owned()
+                        );*/
+                        if str[prev..prev + test_num] != str[test_index..test_index + test_num] {
+                            // println!("SKIP");
+                            continue 'other_num;
+                        }
+                    }
+                    println!("Found wrong id: {}", i);
+                    to_sum += i;
+
+                    continue 'bigloop;
+                }
+            }
+            sum + to_sum
+        });
+
+    println!("sol1: {}", sum);
+}
+
+fn main() -> Result<()> {
+    let text = fs::read_to_string("src/day2/day2-act.txt")?;
+
+    sol1(&text);
+
+    sol2(&text);
+
+    Ok(())
+}