solution 02-12-2025

02-12-2025/main.rs

@@ -0,0 +1,48 @@
+use std::fs;
+
+fn main() {
+    // let input = [
+    //     "11-22",
+    //     "95-115",
+    //     "998-1012",
+    //     "1188511880-1188511890",
+    //     "222220-222224",
+    //     "1698522-1698528",
+    //     "446443-446449",
+    //     "38593856-38593862",
+    //     "565653-565659",
+    //     "824824821-824824827",
+    //     "2121212118-2121212124",
+    // ];
+    let input: String =
+        fs::read_to_string("input.txt").expect("text file cannot be read to string");
+    let input = input.split(",");
+
+    let mut sum: i64 = 0;
+
+    for range in input {
+        if range == "" {
+            break;
+        }
+        let range = range.replacen("\n", "", 1);
+        let numbers = range.split("-");
+        let numbers: Vec<&str> = numbers.collect();
+        let start_number: i64 = numbers[0].parse::<i64>().unwrap();
+        let end_number: i64 = numbers[1].parse::<i64>().unwrap();
+
+        for n in start_number..(end_number + 1) {
+            let n_string: String = n.to_string();
+            if n_string.len() % 2 == 0 {
+                let first_slice = &n_string[..(n_string.len() / 2)];
+                let second_slice = &n_string[(n_string.len() / 2)..];
+
+                if first_slice == second_slice {
+                    println!("Found an id: {first_slice}{second_slice}");
+                    sum += i64::from(n);
+                    continue;
+                }
+            }
+        }
+    }
+    println!("The sum of all invalid ids: {sum}");
+}