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: WA: Presentation Error)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class Main {

	/*??????????????????*/
	public static void judge(int S){
		if(S<0||S>=86400){
			System.out.println("0~86400????????????.???????????????.");
			System.exit(0);
		}
		else System.out.println("");
	}

	 public static void main(String[] args) throws IOException{
		// TODO ?????????????????????????????????????????????

		/*?????°?????£?¨?*/
		int h,m,s,S=0; //?????????????????¨????????????????§???°
		int hour,minutes; //??????(?§?)?????????
		String str;

		/*?§???°???????????????*/

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		str = br.readLine();
		S = Integer.parseInt(str);

		judge(S); /*?§???°S?????¶?´???????*/

		/*???????????????*/
		h = S/3600;
		hour = S%3600;

		m = hour/60;
		minutes = hour%60;

		s = minutes;


		System.out.println(h+":"+m+":"+s);

	}

}