import java.io.*;
class Main
{
public static void main(String args[]) throws IOException
{

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

			String str=br.readLine();
		
int S =Integer.parseInt(str);
int h=S/3600;
int m=S%3600/60;
int s=S%60;


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