import java.io.*;
import java.util.*;

class Main
{
    public static void main(String[] args)
    {
	Scanner sc = new Scanner(System.in);
	
int se =sc.nextInt();

int sec, min, hour;
hour = se/3600;
min =(se%3600)/60;
sec = se % 60;

System.out.println(hour+":"+min+":"+sec);

    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz