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));

		String str = br.readLine();
		int num = Integer.parseInt(str);

		int h;
		int m;
		int s;

		s = num%60;
		m = num/60%60;
		h = num/60/60;

		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{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str = br.readLine();
		int num = Integer.parseInt(str);

		int h;
		int m;
		int s;

		s = num%60;
		m = num/60%60;
		h = num/60/60;

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

} Main public static void main(String[] args) throws IOException{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str = br.readLine();
		int num = Integer.parseInt(str);

		int h;
		int m;
		int s;

		s = num%60;
		m = num/60%60;
		h = num/60/60;

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

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str = br.readLine();
		int num = Integer.parseInt(str);

		int h;
		int m;
		int s;

		s = num%60;
		m = num/60%60;
		h = num/60/60;

		System.out.println(h + ":" + m + ":" + s);
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String str = br.readLine(); str br.readLine() br.readLine br int num = Integer.parseInt(str); num Integer.parseInt(str) Integer.parseInt Integer str int h; h int m; m int s; s s = num%60 s num%60 num 60 m = num/60%60 m num/60%60 num/60 num 60 60 h = num/60/60 h num/60/60 num/60/60 num 60 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{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str = br.readLine();
		int num = Integer.parseInt(str);

		int h;
		int m;
		int s;

		s = num%60;
		m = num/60%60;
		h = num/60/60;

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

} public class Main {

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

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str = br.readLine();
		int num = Integer.parseInt(str);

		int h;
		int m;
		int s;

		s = num%60;
		m = num/60%60;
		h = num/60/60;

		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{

		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str = br.readLine();
		int num = Integer.parseInt(str);

		int h;
		int m;
		int s;

		s = num%60;
		m = num/60%60;
		h = num/60/60;

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

}