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

public class Main {

	public static void main(String[] args) {

		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		}
	}

} 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) {

		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		}
	}

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

		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		}
	} main {

		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		}
	} try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		} catch(IOException e) {
			System.err.println(e);
		} IOException e {
			System.err.println(e);
		} System.err.println(e) System.err.println System.err System System.err e {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} InputStreamReader isr = new InputStreamReader(System.in); isr new InputStreamReader(System.in) BufferedReader br = new BufferedReader(isr); br new BufferedReader(isr) String buf = br.readLine(); buf br.readLine() br.readLine br int a = Integer.parseInt(buf); a Integer.parseInt(buf) Integer.parseInt Integer buf if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			} 0 <= a || a < 86400 0 <= a 0 a a < 86400 a 86400 {
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			} int hour = a /3600; hour a /3600 a 3600 int min = (a% 3600) / 60; min (a% 3600) / 60 (a% 3600) a 3600 60 int sec = (a% 3600) % 60; sec (a% 3600) % 60 (a% 3600) a 3600 60 System.out.println(hour+":" + min + ":" + sec) System.out.println System.out System System.out hour+":" + min + ":" + sec ":" min hour+":" + min + ":" + sec hour ":" min ":" sec String[] args args public class Main {

	public static void main(String[] args) {

		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		}
	}

} public class Main {

	public static void main(String[] args) {

		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		}
	}

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

public class Main {

	public static void main(String[] args) {

		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			String buf = br.readLine();
			int a = Integer.parseInt(buf);
			
			if(0 <= a || a < 86400){
				int hour = a /3600;
				int min = (a% 3600) / 60;
				int sec = (a% 3600) % 60;
				
			System.out.println(hour+":" + min + ":" + sec);
			}
		} catch(IOException e) {
			System.err.println(e);
		}
	}

}