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 input = Integer.parseInt(br.readLine());
	
	int h = input/3600;
	int ms = input%3600;
	int m = ms/60;
	int s = ms%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));
	
	int input = Integer.parseInt(br.readLine());
	
	int h = input/3600;
	int ms = input%3600;
	int m = ms/60;
	int s = ms%60;

	System.out.println(h + ":" + m + ":" + s);
    }
} Main public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	
	int input = Integer.parseInt(br.readLine());
	
	int h = input/3600;
	int ms = input%3600;
	int m = ms/60;
	int s = ms%60;

	System.out.println(h + ":" + m + ":" + s);
    } main {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	
	int input = Integer.parseInt(br.readLine());
	
	int h = input/3600;
	int ms = input%3600;
	int m = ms/60;
	int s = ms%60;

	System.out.println(h + ":" + m + ":" + s);
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int input = Integer.parseInt(br.readLine()); input Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br int h = input/3600; h input/3600 input 3600 int ms = input%3600; ms input%3600 input 3600 int m = ms/60; m ms/60 ms 60 int s = ms%60; s ms%60 ms 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));
	
	int input = Integer.parseInt(br.readLine());
	
	int h = input/3600;
	int ms = input%3600;
	int m = ms/60;
	int s = ms%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));
	
	int input = Integer.parseInt(br.readLine());
	
	int h = input/3600;
	int ms = input%3600;
	int m = ms/60;
	int s = ms%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));
	
	int input = Integer.parseInt(br.readLine());
	
	int h = input/3600;
	int ms = input%3600;
	int m = ms/60;
	int s = ms%60;

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