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

public class Main{

	public static void main(String[] args) throws IOException
	{
		int n,h,m,s;

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

		h = n/3600;

		m = (n/60)%60;

		s = n%60;

		System.out.println( h + ":" + m + ":" + s);
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main{

	public static void main(String[] args) throws IOException
	{
		int n,h,m,s;

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

		h = n/3600;

		m = (n/60)%60;

		s = n%60;

		System.out.println( h + ":" + m + ":" + s);
	}
} Main public static void main(String[] args) throws IOException
	{
		int n,h,m,s;

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

		h = n/3600;

		m = (n/60)%60;

		s = n%60;

		System.out.println( h + ":" + m + ":" + s);
	} main {
		int n,h,m,s;

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

		h = n/3600;

		m = (n/60)%60;

		s = n%60;

		System.out.println( h + ":" + m + ":" + s);
	} int n n h h m m s; s BufferedReader br = new BufferedReader(new InputStreamReader(System.in) ); br new BufferedReader(new InputStreamReader(System.in) ) n = Integer.parseInt(br.readLine() ) n Integer.parseInt(br.readLine() ) Integer.parseInt Integer br.readLine() br.readLine br h = n/3600 h n/3600 n 3600 m = (n/60)%60 m (n/60)%60 (n/60) n 60 60 s = n%60 s n%60 n 60 System.out.println( h + ":" + m + ":" + s) System.out.println System.out System System.out h + ":" + m + ":" + s ":" m h + ":" + m + ":" + s h ":" m ":" s String[] args args public class Main{

	public static void main(String[] args) throws IOException
	{
		int n,h,m,s;

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

		h = n/3600;

		m = (n/60)%60;

		s = n%60;

		System.out.println( h + ":" + m + ":" + s);
	}
} public class Main{

	public static void main(String[] args) throws IOException
	{
		int n,h,m,s;

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

		h = n/3600;

		m = (n/60)%60;

		s = n%60;

		System.out.println( h + ":" + m + ":" + s);
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{

	public static void main(String[] args) throws IOException
	{
		int n,h,m,s;

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

		h = n/3600;

		m = (n/60)%60;

		s = n%60;

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