import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class Main{
  public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + s);
	}
} import java.io.BufferedReader; BufferedReader java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main{
  public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + s);
	}
} Main public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + s);
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + s);
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int second = Integer.parseInt(br.readLine()); second Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br int h = second / (60 * 60); h second / (60 * 60) second (60 * 60) 60 60 int m = second % (60 * 60) / 60; m second % (60 * 60) / 60 second % (60 * 60) second (60 * 60) 60 60 60 int s = second % (60 * 60) % 60; s second % (60 * 60) % 60 second % (60 * 60) % 60 second (60 * 60) 60 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 Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + s);
	}
} public class Main{
  public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + s);
	}
} Main
import java.io.BufferedReader;
import java.io.InputStreamReader;
 
public class Main{
  public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int second = Integer.parseInt(br.readLine());
		int h = second / (60 * 60);
                int m = second % (60 * 60) / 60;
                int s = second % (60 * 60) % 60;
                System.out.println(h + ":" + m + ":" + s);
	}
}