Problem:
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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: Wrong Answer)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{
	public static void main(String[] args)throws IOException{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		int b = 0;
		int c = 0;

		int su = Integer.parseInt(br.readLine());
		if((su < 0) && (86400 <= su)){

			if(su >= 60){
				c = su / 60;
				su %= 60;
			}
			if(c >= 60){
				b = c / 60;
				c = c % 60;
			}
		}

		System.out.println(b+":"+c + ":" + su);
	}
}