[TASK] Solved day 3

src/main.rs

@@ -4,6 +4,7 @@ use std::time::Instant;
 mod util;
 mod day1;
 mod day2;
+mod day3;
 
 fn main() {
 
@@ -16,12 +17,14 @@ fn main() {
         match args[day_arg_idx.unwrap() + 1].parse::<u8>().unwrap() {
             1 => day1::solve(),
             2 => day2::solve(),
+            3 => day3::solve(),
             _ => println!("This day is not yet implemented")
         }
     } else {
         // Solve all days:
         day1::solve();
         day2::solve();
+        day3::solve();
     }
 
     println!("Execution took {} μs", now.elapsed().as_micros());