Seconds to Clock Format

/*
 * Problem : Clock format.
 * Input   : Seconds.
 * Output  : HH:MM:SS.
 * Approach: Division and remainder.
 * Time    : O(1)
 * Space   : O(1)
 * Java    : 8 or newer.
 */
import java.util.Scanner;

public class Main {
    // This method solves the task. It receives the input and returns the answer.
    static String solve(long n) {
        // Step 1: One hour is 3600 seconds. The rest after the hours is less than 3600.
        long hours = n / 3600;
        // Step 2: One minute is 60 seconds. Use the remainder (%) to find the rest after the hours.
        long minutes = n % 3600 / 60;
        // Step 3: The seconds are what is left after whole minutes.
        long seconds = n % 60;
        return String.format("%02d:%02d:%02d", hours, minutes, seconds);
    }

    public static void main(String[] args) {
        long n = new Scanner(System.in).nextLong();
        System.out.println(solve(n));
    }
}