Problem:
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Watch

Write a program which reads an integer $S$ [second] and converts it to $h:m:s$ where $h$, $m$, $s$ denote hours, minutes (less than 60) and seconds (less than 60) respectively.

Input

An integer $S$ is given in a line.

Output

Print $h$, $m$ and $s$ separated by ':'. You do not need to put '0' for a value, which consists of a digit.

Constraints

$0 \leq S \leq 86400$

Sample Input 1

46979

Sample Output 1

13:2:59

Solution in JAVA (judge verdict: Accepted)

import static java.lang.Integer.parseInt;

public class Main {
    public static void main (String[] args) {
        String line = new java.util.Scanner ( System.in ).nextLine();
        String hour = watch (line);
        System.out.println(hour);
    }
    public static String watch(String line){
        int hour,min,second;
        second = parseInt(line);
        if (second < 0 || second > 86400) {
            System.out.println("Constraints Error");
            return null;
        }
        hour = second / 3600;
        min = (second % 3600 ) / 60;
        second = second % 60;
        
        return hour + ":" + min + ":" + second;
    }
}